Finding the Fourth Proportional to 284,540.88, 392,665.61 and 157,215.56

Step by Step Solution

1. Step 1: Write the proportion equation
   284,540.88 : 392,665.61 = 157,215.56 : x
2. Step 2: Convert to fraction form
   284,540.88/392,665.61 = 157,215.56/x
3. Step 3: Cross multiply
   284,540.88x = 392,665.61 × 157,215.56
4. Step 4: Simplify right side
   284,540.88x = 61,733,145,143.59
5. Step 5: Solve for x
   x = 61,733,145,143.59/284,540.88
6. Step 6: Final answer
   x = 216,957.03