Finding the Third Proportional to 17,005.50 and 18,787.50

Step by Step Solution

1. Step 1: Write the proportion equation
   17,005.50 : 18,787.50 = 18,787.50 : x
2. Step 2: Convert to fraction form
   17,005.50/18,787.50 = 18,787.50/x
3. Step 3: Cross multiply
   17,005.50x = 18,787.50 × 18,787.50
4. Step 4: Simplify right side
   17,005.50x = 352,970,156.25
5. Step 5: Solve for x
   x = 352,970,156.25/17,005.50
6. Step 6: Final answer
   x = 20,756.24