Finding the Third Proportional to 13,590.88 and 20,791.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,590.88 : 20,791.50 = 20,791.50 : x
2. Step 2: Convert to fraction form
   13,590.88/20,791.50 = 20,791.50/x
3. Step 3: Cross multiply
   13,590.88x = 20,791.50 × 20,791.50
4. Step 4: Simplify right side
   13,590.88x = 432,286,472.25
5. Step 5: Solve for x
   x = 432,286,472.25/13,590.88
6. Step 6: Final answer
   x = 31,807.11