Finding the Third Proportional to 10,280 and 14,840

Step by Step Solution

1. Step 1: Write the proportion equation
   10,280 : 14,840 = 14,840 : x
2. Step 2: Convert to fraction form
   10,280/14,840 = 14,840/x
3. Step 3: Cross multiply
   10,280x = 14,840 × 14,840
4. Step 4: Simplify right side
   10,280x = 220,225,600
5. Step 5: Solve for x
   x = 220,225,600/10,280
6. Step 6: Final answer
   x = 21,422.72