Finding the Third Proportional to 13,432.50 and 16,989.75

Step by Step Solution

1. Step 1: Write the proportion equation
   13,432.50 : 16,989.75 = 16,989.75 : x
2. Step 2: Convert to fraction form
   13,432.50/16,989.75 = 16,989.75/x
3. Step 3: Cross multiply
   13,432.50x = 16,989.75 × 16,989.75
4. Step 4: Simplify right side
   13,432.50x = 288,651,605.06
5. Step 5: Solve for x
   x = 288,651,605.06/13,432.50
6. Step 6: Final answer
   x = 21,489.05