Finding the Fourth Proportional to 472,111.86, 651,505.94 and 257,253.78

Step by Step Solution

1. Step 1: Write the proportion equation
   472,111.86 : 651,505.94 = 257,253.78 : x
2. Step 2: Convert to fraction form
   472,111.86/651,505.94 = 257,253.78/x
3. Step 3: Cross multiply
   472,111.86x = 651,505.94 × 257,253.78
4. Step 4: Simplify right side
   472,111.86x = 167,602,365,757.45
5. Step 5: Solve for x
   x = 167,602,365,757.45/472,111.86
6. Step 6: Final answer
   x = 355,005.62