Finding the Fourth Proportional to 888,388.57, 1,225,976.42 and 501,286.15

Step by Step Solution

1. Step 1: Write the proportion equation
   888,388.57 : 1,225,976.42 = 501,286.15 : x
2. Step 2: Convert to fraction form
   888,388.57/1,225,976.42 = 501,286.15/x
3. Step 3: Cross multiply
   888,388.57x = 1,225,976.42 × 501,286.15
4. Step 4: Simplify right side
   888,388.57x = 614,565,002,358.27
5. Step 5: Solve for x
   x = 614,565,002,358.27/888,388.57
6. Step 6: Final answer
   x = 691,775.00