Finding the Fourth Proportional to 429,692.15, 643,320.27 and 357,061.88

Step by Step Solution

1. Step 1: Write the proportion equation
   429,692.15 : 643,320.27 = 357,061.88 : x
2. Step 2: Convert to fraction form
   429,692.15/643,320.27 = 357,061.88/x
3. Step 3: Cross multiply
   429,692.15x = 643,320.27 × 357,061.88
4. Step 4: Simplify right side
   429,692.15x = 229,705,141,831.71
5. Step 5: Solve for x
   x = 229,705,141,831.71/429,692.15
6. Step 6: Final answer
   x = 534,580.73