Finding the Third Proportional to 11,006.63 and 16,720.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,006.63 : 16,720.50 = 16,720.50 : x
2. Step 2: Convert to fraction form
   11,006.63/16,720.50 = 16,720.50/x
3. Step 3: Cross multiply
   11,006.63x = 16,720.50 × 16,720.50
4. Step 4: Simplify right side
   11,006.63x = 279,575,120.25
5. Step 5: Solve for x
   x = 279,575,120.25/11,006.63
6. Step 6: Final answer
   x = 25,400.62