Finding the Third Proportional to 13,110 and 19,672.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,110 : 19,672.50 = 19,672.50 : x
2. Step 2: Convert to fraction form
   13,110/19,672.50 = 19,672.50/x
3. Step 3: Cross multiply
   13,110x = 19,672.50 × 19,672.50
4. Step 4: Simplify right side
   13,110x = 387,007,256.25
5. Step 5: Solve for x
   x = 387,007,256.25/13,110
6. Step 6: Final answer
   x = 29,520.00