Finding the Third Proportional to 11,672 and 15,320.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,672 : 15,320.50 = 15,320.50 : x
2. Step 2: Convert to fraction form
   11,672/15,320.50 = 15,320.50/x
3. Step 3: Cross multiply
   11,672x = 15,320.50 × 15,320.50
4. Step 4: Simplify right side
   11,672x = 234,717,720.25
5. Step 5: Solve for x
   x = 234,717,720.25/11,672
6. Step 6: Final answer
   x = 20,109.47