Finding the Fourth Proportional to 71,142.29, 98,172.10 and 38,870.47

Step by Step Solution

1. Step 1: Write the proportion equation
   71,142.29 : 98,172.10 = 38,870.47 : x
2. Step 2: Convert to fraction form
   71,142.29/98,172.10 = 38,870.47/x
3. Step 3: Cross multiply
   71,142.29x = 98,172.10 × 38,870.47
4. Step 4: Simplify right side
   71,142.29x = 3,815,995,667.89
5. Step 5: Solve for x
   x = 3,815,995,667.89/71,142.29
6. Step 6: Final answer
   x = 53,638.92