Finding the Third Proportional to 12,772.69 and 17,139.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,772.69 : 17,139.09 = 17,139.09 : x
2. Step 2: Convert to fraction form
   12,772.69/17,139.09 = 17,139.09/x
3. Step 3: Cross multiply
   12,772.69x = 17,139.09 × 17,139.09
4. Step 4: Simplify right side
   12,772.69x = 293,748,534.57
5. Step 5: Solve for x
   x = 293,748,534.57/12,772.69
6. Step 6: Final answer
   x = 22,998.18