Finding the Fourth Proportional to 71,646.88, 98,870.88 and 39,818.56

Step by Step Solution

1. Step 1: Write the proportion equation
   71,646.88 : 98,870.88 = 39,818.56 : x
2. Step 2: Convert to fraction form
   71,646.88/98,870.88 = 39,818.56/x
3. Step 3: Cross multiply
   71,646.88x = 98,870.88 × 39,818.56
4. Step 4: Simplify right side
   71,646.88x = 3,936,896,067.53
5. Step 5: Solve for x
   x = 3,936,896,067.53/71,646.88
6. Step 6: Final answer
   x = 54,948.60