Finding the Fourth Proportional to 80,109.16, 120,235.02 and 42,700.12

Step by Step Solution

1. Step 1: Write the proportion equation
   80,109.16 : 120,235.02 = 42,700.12 : x
2. Step 2: Convert to fraction form
   80,109.16/120,235.02 = 42,700.12/x
3. Step 3: Cross multiply
   80,109.16x = 120,235.02 × 42,700.12
4. Step 4: Simplify right side
   80,109.16x = 5,134,049,782.20
5. Step 5: Solve for x
   x = 5,134,049,782.20/80,109.16
6. Step 6: Final answer
   x = 64,088.17