Finding the Third Proportional to 9,891.50 and 15,131.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,891.50 : 15,131.50 = 15,131.50 : x
2. Step 2: Convert to fraction form
   9,891.50/15,131.50 = 15,131.50/x
3. Step 3: Cross multiply
   9,891.50x = 15,131.50 × 15,131.50
4. Step 4: Simplify right side
   9,891.50x = 228,962,292.25
5. Step 5: Solve for x
   x = 228,962,292.25/9,891.50
6. Step 6: Final answer
   x = 23,147.38