Finding the Fourth Proportional to 365,111.28, 547,009.20 and 343,152.72

Step by Step Solution

1. Step 1: Write the proportion equation
   365,111.28 : 547,009.20 = 343,152.72 : x
2. Step 2: Convert to fraction form
   365,111.28/547,009.20 = 343,152.72/x
3. Step 3: Cross multiply
   365,111.28x = 547,009.20 × 343,152.72
4. Step 4: Simplify right side
   365,111.28x = 187,707,694,845.02
5. Step 5: Solve for x
   x = 187,707,694,845.02/365,111.28
6. Step 6: Final answer
   x = 514,110.92