Finding the Third Proportional to 10,422 and 21,046.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,422 : 21,046.50 = 21,046.50 : x
2. Step 2: Convert to fraction form
   10,422/21,046.50 = 21,046.50/x
3. Step 3: Cross multiply
   10,422x = 21,046.50 × 21,046.50
4. Step 4: Simplify right side
   10,422x = 442,955,162.25
5. Step 5: Solve for x
   x = 442,955,162.25/10,422
6. Step 6: Final answer
   x = 42,501.93