Finding the Fourth Proportional to 51,507.54, 71,061.57 and 42,115.86

Step by Step Solution

1. Step 1: Write the proportion equation
   51,507.54 : 71,061.57 = 42,115.86 : x
2. Step 2: Convert to fraction form
   51,507.54/71,061.57 = 42,115.86/x
3. Step 3: Cross multiply
   51,507.54x = 71,061.57 × 42,115.86
4. Step 4: Simplify right side
   51,507.54x = 2,992,819,133.50
5. Step 5: Solve for x
   x = 2,992,819,133.50/51,507.54
6. Step 6: Final answer
   x = 58,104.49