Finding the Fourth Proportional to 71,700.04, 98,948.34 and 39,870.28

Step by Step Solution

1. Step 1: Write the proportion equation
   71,700.04 : 98,948.34 = 39,870.28 : x
2. Step 2: Convert to fraction form
   71,700.04/98,948.34 = 39,870.28/x
3. Step 3: Cross multiply
   71,700.04x = 98,948.34 × 39,870.28
4. Step 4: Simplify right side
   71,700.04x = 3,945,098,021.34
5. Step 5: Solve for x
   x = 3,945,098,021.34/71,700.04
6. Step 6: Final answer
   x = 55,022.26