Finding the Third Proportional to 12,871.41 and 15,434.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,871.41 : 15,434.30 = 15,434.30 : x
2. Step 2: Convert to fraction form
   12,871.41/15,434.30 = 15,434.30/x
3. Step 3: Cross multiply
   12,871.41x = 15,434.30 × 15,434.30
4. Step 4: Simplify right side
   12,871.41x = 238,217,520.03
5. Step 5: Solve for x
   x = 238,217,520.03/12,871.41
6. Step 6: Final answer
   x = 18,507.50