Finding the Third Proportional to 10,431 and 14,890.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,431 : 14,890.50 = 14,890.50 : x
2. Step 2: Convert to fraction form
   10,431/14,890.50 = 14,890.50/x
3. Step 3: Cross multiply
   10,431x = 14,890.50 × 14,890.50
4. Step 4: Simplify right side
   10,431x = 221,726,990.25
5. Step 5: Solve for x
   x = 221,726,990.25/10,431
6. Step 6: Final answer
   x = 21,256.54