Finding the Fourth Proportional to 71,002.21, 97,983.38 and 39,171.10

Step by Step Solution

1. Step 1: Write the proportion equation
   71,002.21 : 97,983.38 = 39,171.10 : x
2. Step 2: Convert to fraction form
   71,002.21/97,983.38 = 39,171.10/x
3. Step 3: Cross multiply
   71,002.21x = 97,983.38 × 39,171.10
4. Step 4: Simplify right side
   71,002.21x = 3,838,116,090.55
5. Step 5: Solve for x
   x = 3,838,116,090.55/71,002.21
6. Step 6: Final answer
   x = 54,056.29