Finding the Third Proportional to 16,899 and 25,355.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,899 : 25,355.50 = 25,355.50 : x
2. Step 2: Convert to fraction form
   16,899/25,355.50 = 25,355.50/x
3. Step 3: Cross multiply
   16,899x = 25,355.50 × 25,355.50
4. Step 4: Simplify right side
   16,899x = 642,901,380.25
5. Step 5: Solve for x
   x = 642,901,380.25/16,899
6. Step 6: Final answer
   x = 38,043.75