Finding the Fourth Proportional to 429,100.86, 643,505.49 and 148,552.50

Step by Step Solution

1. Step 1: Write the proportion equation
   429,100.86 : 643,505.49 = 148,552.50 : x
2. Step 2: Convert to fraction form
   429,100.86/643,505.49 = 148,552.50/x
3. Step 3: Cross multiply
   429,100.86x = 643,505.49 × 148,552.50
4. Step 4: Simplify right side
   429,100.86x = 95,594,349,303.23
5. Step 5: Solve for x
   x = 95,594,349,303.23/429,100.86
6. Step 6: Final answer
   x = 222,778.27