Finding the Third Proportional to 14,230.50 and 17,139.75

Step by Step Solution

1. Step 1: Write the proportion equation
   14,230.50 : 17,139.75 = 17,139.75 : x
2. Step 2: Convert to fraction form
   14,230.50/17,139.75 = 17,139.75/x
3. Step 3: Cross multiply
   14,230.50x = 17,139.75 × 17,139.75
4. Step 4: Simplify right side
   14,230.50x = 293,771,030.06
5. Step 5: Solve for x
   x = 293,771,030.06/14,230.50
6. Step 6: Final answer
   x = 20,643.76