Finding the Third Proportional to 16,428 and 25,279.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,428 : 25,279.50 = 25,279.50 : x
2. Step 2: Convert to fraction form
   16,428/25,279.50 = 25,279.50/x
3. Step 3: Cross multiply
   16,428x = 25,279.50 × 25,279.50
4. Step 4: Simplify right side
   16,428x = 639,053,120.25
5. Step 5: Solve for x
   x = 639,053,120.25/16,428
6. Step 6: Final answer
   x = 38,900.24