Finding the Fourth Proportional to 10,871.10, 15,200.10 and 10,871.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,871.10 : 15,200.10 = 10,871.10 : x
2. Step 2: Convert to fraction form
   10,871.10/15,200.10 = 10,871.10/x
3. Step 3: Cross multiply
   10,871.10x = 15,200.10 × 10,871.10
4. Step 4: Simplify right side
   10,871.10x = 165,241,807.11
5. Step 5: Solve for x
   x = 165,241,807.11/10,871.10
6. Step 6: Final answer
   x = 15,200.10