Finding the Fourth Proportional to 80,109.52, 120,236.50 and 42,700.75

Step by Step Solution

1. Step 1: Write the proportion equation
   80,109.52 : 120,236.50 = 42,700.75 : x
2. Step 2: Convert to fraction form
   80,109.52/120,236.50 = 42,700.75/x
3. Step 3: Cross multiply
   80,109.52x = 120,236.50 × 42,700.75
4. Step 4: Simplify right side
   80,109.52x = 5,134,188,480.16
5. Step 5: Solve for x
   x = 5,134,188,480.16/80,109.52
6. Step 6: Final answer
   x = 64,089.62