Finding the Fourth Proportional to 79,978.92, 120,042.20 and 40,563.72

Step by Step Solution

1. Step 1: Write the proportion equation
   79,978.92 : 120,042.20 = 40,563.72 : x
2. Step 2: Convert to fraction form
   79,978.92/120,042.20 = 40,563.72/x
3. Step 3: Cross multiply
   79,978.92x = 120,042.20 × 40,563.72
4. Step 4: Simplify right side
   79,978.92x = 4,869,357,986.17
5. Step 5: Solve for x
   x = 4,869,357,986.17/79,978.92
6. Step 6: Final answer
   x = 60,883.02