Finding the Fourth Proportional to 71,881.32, 99,196.89 and 39,617.09

Step by Step Solution

1. Step 1: Write the proportion equation
   71,881.32 : 99,196.89 = 39,617.09 : x
2. Step 2: Convert to fraction form
   71,881.32/99,196.89 = 39,617.09/x
3. Step 3: Cross multiply
   71,881.32x = 99,196.89 × 39,617.09
4. Step 4: Simplify right side
   71,881.32x = 3,929,891,622.87
5. Step 5: Solve for x
   x = 3,929,891,622.87/71,881.32
6. Step 6: Final answer
   x = 54,671.95