Finding the Fourth Proportional to 71,987.10, 99,341.52 and 39,722.01

Step by Step Solution

1. Step 1: Write the proportion equation
   71,987.10 : 99,341.52 = 39,722.01 : x
2. Step 2: Convert to fraction form
   71,987.10/99,341.52 = 39,722.01/x
3. Step 3: Cross multiply
   71,987.10x = 99,341.52 × 39,722.01
4. Step 4: Simplify right side
   71,987.10x = 3,946,044,850.86
5. Step 5: Solve for x
   x = 3,946,044,850.86/71,987.10
6. Step 6: Final answer
   x = 54,816.00