Finding the Fourth Proportional to 1,556,312,456,345.10, 2,147,778,701,468.70 and 861,853,014,151.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,556,312,456,345.10 : 2,147,778,701,468.70 = 861,853,014,151.10 : x
2. Step 2: Convert to fraction form
   1,556,312,456,345.10/2,147,778,701,468.70 = 861,853,014,151.10/x
3. Step 3: Cross multiply
   1,556,312,456,345.10x = 2,147,778,701,468.70 × 861,853,014,151.10
4. Step 4: Simplify right side
   1,556,312,456,345.10x = 1,851,069,547,590,334,648,680,448
5. Step 5: Solve for x
   x = 1,851,069,547,590,334,648,680,448/1,556,312,456,345.10
6. Step 6: Final answer
   x = 1,189,394,546,090.99