Finding the Fourth Proportional to 538,150.72, 806,807.20 and 348,209.76

Step by Step Solution

1. Step 1: Write the proportion equation
   538,150.72 : 806,807.20 = 348,209.76 : x
2. Step 2: Convert to fraction form
   538,150.72/806,807.20 = 348,209.76/x
3. Step 3: Cross multiply
   538,150.72x = 806,807.20 × 348,209.76
4. Step 4: Simplify right side
   538,150.72x = 280,938,141,478.27
5. Step 5: Solve for x
   x = 280,938,141,478.27/538,150.72
6. Step 6: Final answer
   x = 522,043.60