Finding the Third Proportional to 10,428 and 14,890

Step by Step Solution

1. Step 1: Write the proportion equation
   10,428 : 14,890 = 14,890 : x
2. Step 2: Convert to fraction form
   10,428/14,890 = 14,890/x
3. Step 3: Cross multiply
   10,428x = 14,890 × 14,890
4. Step 4: Simplify right side
   10,428x = 221,712,100
5. Step 5: Solve for x
   x = 221,712,100/10,428
6. Step 6: Final answer
   x = 21,261.23