Finding the Third Proportional to 15,801.75 and 18,535.50

Step by Step Solution

1. Step 1: Write the proportion equation
   15,801.75 : 18,535.50 = 18,535.50 : x
2. Step 2: Convert to fraction form
   15,801.75/18,535.50 = 18,535.50/x
3. Step 3: Cross multiply
   15,801.75x = 18,535.50 × 18,535.50
4. Step 4: Simplify right side
   15,801.75x = 343,564,760.25
5. Step 5: Solve for x
   x = 343,564,760.25/15,801.75
6. Step 6: Final answer
   x = 21,742.20