Finding the Fourth Proportional to 71,494.90, 98,674.78 and 39,674.05

Step by Step Solution

1. Step 1: Write the proportion equation
   71,494.90 : 98,674.78 = 39,674.05 : x
2. Step 2: Convert to fraction form
   71,494.90/98,674.78 = 39,674.05/x
3. Step 3: Cross multiply
   71,494.90x = 98,674.78 × 39,674.05
4. Step 4: Simplify right side
   71,494.90x = 3,914,828,155.46
5. Step 5: Solve for x
   x = 3,914,828,155.46/71,494.90
6. Step 6: Final answer
   x = 54,756.75