Finding the Fourth Proportional to 71,884.50, 99,196.59 and 39,618.06

Step by Step Solution

1. Step 1: Write the proportion equation
   71,884.50 : 99,196.59 = 39,618.06 : x
2. Step 2: Convert to fraction form
   71,884.50/99,196.59 = 39,618.06/x
3. Step 3: Cross multiply
   71,884.50x = 99,196.59 × 39,618.06
4. Step 4: Simplify right side
   71,884.50x = 3,929,976,454.42
5. Step 5: Solve for x
   x = 3,929,976,454.42/71,884.50
6. Step 6: Final answer
   x = 54,670.71