Finding the Fourth Proportional to 71,613.24, 98,821.56 and 39,782.16

Step by Step Solution

1. Step 1: Write the proportion equation
   71,613.24 : 98,821.56 = 39,782.16 : x
2. Step 2: Convert to fraction form
   71,613.24/98,821.56 = 39,782.16/x
3. Step 3: Cross multiply
   71,613.24x = 98,821.56 × 39,782.16
4. Step 4: Simplify right side
   71,613.24x = 3,931,335,111.37
5. Step 5: Solve for x
   x = 3,931,335,111.37/71,613.24
6. Step 6: Final answer
   x = 54,896.76