Finding the Fourth Proportional to 71,872.79, 99,184.59 and 40,042.82

Step by Step Solution

1. Step 1: Write the proportion equation
   71,872.79 : 99,184.59 = 40,042.82 : x
2. Step 2: Convert to fraction form
   71,872.79/99,184.59 = 40,042.82/x
3. Step 3: Cross multiply
   71,872.79x = 99,184.59 × 40,042.82
4. Step 4: Simplify right side
   71,872.79x = 3,971,630,188.22
5. Step 5: Solve for x
   x = 3,971,630,188.22/71,872.79
6. Step 6: Final answer
   x = 55,259.17