Finding the Fourth Proportional to 71,685.64, 98,928.71 and 39,422.71

Step by Step Solution

1. Step 1: Write the proportion equation
   71,685.64 : 98,928.71 = 39,422.71 : x
2. Step 2: Convert to fraction form
   71,685.64/98,928.71 = 39,422.71/x
3. Step 3: Cross multiply
   71,685.64x = 98,928.71 × 39,422.71
4. Step 4: Simplify right side
   71,685.64x = 3,900,037,845.00
5. Step 5: Solve for x
   x = 3,900,037,845.00/71,685.64
6. Step 6: Final answer
   x = 54,404.73