Finding the Fourth Proportional to 402,700.72, 604,517.72 and 216,076.72

Step by Step Solution

1. Step 1: Write the proportion equation
   402,700.72 : 604,517.72 = 216,076.72 : x
2. Step 2: Convert to fraction form
   402,700.72/604,517.72 = 216,076.72/x
3. Step 3: Cross multiply
   402,700.72x = 604,517.72 × 216,076.72
4. Step 4: Simplify right side
   402,700.72x = 130,622,206,119.48
5. Step 5: Solve for x
   x = 130,622,206,119.48/402,700.72
6. Step 6: Final answer
   x = 324,365.46