Finding the Fourth Proportional to 62,143.58, 85,728.80 and 42,007.48

Step by Step Solution

1. Step 1: Write the proportion equation
   62,143.58 : 85,728.80 = 42,007.48 : x
2. Step 2: Convert to fraction form
   62,143.58/85,728.80 = 42,007.48/x
3. Step 3: Cross multiply
   62,143.58x = 85,728.80 × 42,007.48
4. Step 4: Simplify right side
   62,143.58x = 3,601,250,851.42
5. Step 5: Solve for x
   x = 3,601,250,851.42/62,143.58
6. Step 6: Final answer
   x = 57,950.49