Finding the Fourth Proportional to 80,108.16, 120,233.52 and 42,699.12

Step by Step Solution

1. Step 1: Write the proportion equation
   80,108.16 : 120,233.52 = 42,699.12 : x
2. Step 2: Convert to fraction form
   80,108.16/120,233.52 = 42,699.12/x
3. Step 3: Cross multiply
   80,108.16x = 120,233.52 × 42,699.12
4. Step 4: Simplify right side
   80,108.16x = 5,133,865,498.50
5. Step 5: Solve for x
   x = 5,133,865,498.50/80,108.16
6. Step 6: Final answer
   x = 64,086.67