Finding the Third Proportional to 12,191.50 and 18,207.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,191.50 : 18,207.50 = 18,207.50 : x
2. Step 2: Convert to fraction form
   12,191.50/18,207.50 = 18,207.50/x
3. Step 3: Cross multiply
   12,191.50x = 18,207.50 × 18,207.50
4. Step 4: Simplify right side
   12,191.50x = 331,513,056.25
5. Step 5: Solve for x
   x = 331,513,056.25/12,191.50
6. Step 6: Final answer
   x = 27,192.15