Finding the Fourth Proportional to 1,087,964,574.26, 1,501,396,196.86 and 618,091,678.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087,964,574.26 : 1,501,396,196.86 = 618,091,678.42 : x
2. Step 2: Convert to fraction form
   1,087,964,574.26/1,501,396,196.86 = 618,091,678.42/x
3. Step 3: Cross multiply
   1,087,964,574.26x = 1,501,396,196.86 × 618,091,678.42
4. Step 4: Simplify right side
   1,087,964,574.26x = 928,000,495,290,601,984
5. Step 5: Solve for x
   x = 928,000,495,290,601,984/1,087,964,574.26
6. Step 6: Final answer
   x = 852,969,404.75