Finding the Fourth Proportional to 1,556,312,456,345.30, 2,147,778,701,469.20 and 861,853,014,151.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,556,312,456,345.30 : 2,147,778,701,469.20 = 861,853,014,151.35 : x
2. Step 2: Convert to fraction form
   1,556,312,456,345.30/2,147,778,701,469.20 = 861,853,014,151.35/x
3. Step 3: Cross multiply
   1,556,312,456,345.30x = 2,147,778,701,469.20 × 861,853,014,151.35
4. Step 4: Simplify right side
   1,556,312,456,345.30x = 1,851,069,547,591,302,358,499,328
5. Step 5: Solve for x
   x = 1,851,069,547,591,302,358,499,328/1,556,312,456,345.30
6. Step 6: Final answer
   x = 1,189,394,546,091.46