Finding the Fourth Proportional to 71,971.38, 99,320.67 and 40,142.34

Step by Step Solution

1. Step 1: Write the proportion equation
   71,971.38 : 99,320.67 = 40,142.34 : x
2. Step 2: Convert to fraction form
   71,971.38/99,320.67 = 40,142.34/x
3. Step 3: Cross multiply
   71,971.38x = 99,320.67 × 40,142.34
4. Step 4: Simplify right side
   71,971.38x = 3,986,964,104.17
5. Step 5: Solve for x
   x = 3,986,964,104.17/71,971.38
6. Step 6: Final answer
   x = 55,396.52