Finding the Fourth Proportional to 80,216.80, 120,272.08 and 42,753.12

Step by Step Solution

1. Step 1: Write the proportion equation
   80,216.80 : 120,272.08 = 42,753.12 : x
2. Step 2: Convert to fraction form
   80,216.80/120,272.08 = 42,753.12/x
3. Step 3: Cross multiply
   80,216.80x = 120,272.08 × 42,753.12
4. Step 4: Simplify right side
   80,216.80x = 5,142,006,668.89
5. Step 5: Solve for x
   x = 5,142,006,668.89/80,216.80
6. Step 6: Final answer
   x = 64,101.37