Finding the Fourth Proportional to 71,019.48, 98,004.42 and 39,189.72

Step by Step Solution

1. Step 1: Write the proportion equation
   71,019.48 : 98,004.42 = 39,189.72 : x
2. Step 2: Convert to fraction form
   71,019.48/98,004.42 = 39,189.72/x
3. Step 3: Cross multiply
   71,019.48x = 98,004.42 × 39,189.72
4. Step 4: Simplify right side
   71,019.48x = 3,840,765,778.56
5. Step 5: Solve for x
   x = 3,840,765,778.56/71,019.48
6. Step 6: Final answer
   x = 54,080.45