Finding the Fourth Proportional to 62,304.48, 85,978.53 and 57,288.96

Step by Step Solution

1. Step 1: Write the proportion equation
   62,304.48 : 85,978.53 = 57,288.96 : x
2. Step 2: Convert to fraction form
   62,304.48/85,978.53 = 57,288.96/x
3. Step 3: Cross multiply
   62,304.48x = 85,978.53 × 57,288.96
4. Step 4: Simplify right side
   62,304.48x = 4,925,620,566.03
5. Step 5: Solve for x
   x = 4,925,620,566.03/62,304.48
6. Step 6: Final answer
   x = 79,057.25