Finding the Third Proportional to 12,315 and 18,373.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,315 : 18,373.50 = 18,373.50 : x
2. Step 2: Convert to fraction form
   12,315/18,373.50 = 18,373.50/x
3. Step 3: Cross multiply
   12,315x = 18,373.50 × 18,373.50
4. Step 4: Simplify right side
   12,315x = 337,585,502.25
5. Step 5: Solve for x
   x = 337,585,502.25/12,315
6. Step 6: Final answer
   x = 27,412.55