Finding the Fourth Proportional to 71,674.40, 98,581.80 and 57,496.16

Step by Step Solution

1. Step 1: Write the proportion equation
   71,674.40 : 98,581.80 = 57,496.16 : x
2. Step 2: Convert to fraction form
   71,674.40/98,581.80 = 57,496.16/x
3. Step 3: Cross multiply
   71,674.40x = 98,581.80 × 57,496.16
4. Step 4: Simplify right side
   71,674.40x = 5,668,074,945.89
5. Step 5: Solve for x
   x = 5,668,074,945.89/71,674.40
6. Step 6: Final answer
   x = 79,080.88