Finding the Fourth Proportional to 898,691,087.27, 1,240,195,380.71 and 502,214,077.27

Step by Step Solution

1. Step 1: Write the proportion equation
   898,691,087.27 : 1,240,195,380.71 = 502,214,077.27 : x
2. Step 2: Convert to fraction form
   898,691,087.27/1,240,195,380.71 = 502,214,077.27/x
3. Step 3: Cross multiply
   898,691,087.27x = 1,240,195,380.71 × 502,214,077.27
4. Step 4: Simplify right side
   898,691,087.27x = 622,843,578,757,789,056
5. Step 5: Solve for x
   x = 622,843,578,757,789,056/898,691,087.27
6. Step 6: Final answer
   x = 693,056,365.62