Finding the Fourth Proportional to 71,643.31, 98,867.06 and 39,811.54

Step by Step Solution

1. Step 1: Write the proportion equation
   71,643.31 : 98,867.06 = 39,811.54 : x
2. Step 2: Convert to fraction form
   71,643.31/98,867.06 = 39,811.54/x
3. Step 3: Cross multiply
   71,643.31x = 98,867.06 × 39,811.54
4. Step 4: Simplify right side
   71,643.31x = 3,936,049,714.81
5. Step 5: Solve for x
   x = 3,936,049,714.81/71,643.31
6. Step 6: Final answer
   x = 54,939.53