Finding the Fourth Proportional to 80,566.72, 120,725.88 and 43,131.76

Step by Step Solution

1. Step 1: Write the proportion equation
   80,566.72 : 120,725.88 = 43,131.76 : x
2. Step 2: Convert to fraction form
   80,566.72/120,725.88 = 43,131.76/x
3. Step 3: Cross multiply
   80,566.72x = 120,725.88 × 43,131.76
4. Step 4: Simplify right side
   80,566.72x = 5,207,119,681.95
5. Step 5: Solve for x
   x = 5,207,119,681.95/80,566.72
6. Step 6: Final answer
   x = 64,631.15