Finding the Third Proportional to 12,130.88 and 18,520.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,130.88 : 18,520.31 = 18,520.31 : x
2. Step 2: Convert to fraction form
   12,130.88/18,520.31 = 18,520.31/x
3. Step 3: Cross multiply
   12,130.88x = 18,520.31 × 18,520.31
4. Step 4: Simplify right side
   12,130.88x = 343,001,975.10
5. Step 5: Solve for x
   x = 343,001,975.10/12,130.88
6. Step 6: Final answer
   x = 28,275.12