Finding the Third Proportional to 10,422 and 14,902.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,422 : 14,902.50 = 14,902.50 : x
2. Step 2: Convert to fraction form
   10,422/14,902.50 = 14,902.50/x
3. Step 3: Cross multiply
   10,422x = 14,902.50 × 14,902.50
4. Step 4: Simplify right side
   10,422x = 222,084,506.25
5. Step 5: Solve for x
   x = 222,084,506.25/10,422
6. Step 6: Final answer
   x = 21,309.20