Finding the Fourth Proportional to 57,612, 79,531.20 and 40,630.08

Step by Step Solution

1. Step 1: Write the proportion equation
   57,612 : 79,531.20 = 40,630.08 : x
2. Step 2: Convert to fraction form
   57,612/79,531.20 = 40,630.08/x
3. Step 3: Cross multiply
   57,612x = 79,531.20 × 40,630.08
4. Step 4: Simplify right side
   57,612x = 3,231,359,018.50
5. Step 5: Solve for x
   x = 3,231,359,018.50/57,612
6. Step 6: Final answer
   x = 56,088.30