Finding the Third Proportional to 13,939.59 and 19,966.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,939.59 : 19,966.50 = 19,966.50 : x
2. Step 2: Convert to fraction form
   13,939.59/19,966.50 = 19,966.50/x
3. Step 3: Cross multiply
   13,939.59x = 19,966.50 × 19,966.50
4. Step 4: Simplify right side
   13,939.59x = 398,661,122.25
5. Step 5: Solve for x
   x = 398,661,122.25/13,939.59
6. Step 6: Final answer
   x = 28,599.19