Finding the Third Proportional to 10,121 and 21,342.25

Step by Step Solution

1. Step 1: Write the proportion equation
   10,121 : 21,342.25 = 21,342.25 : x
2. Step 2: Convert to fraction form
   10,121/21,342.25 = 21,342.25/x
3. Step 3: Cross multiply
   10,121x = 21,342.25 × 21,342.25
4. Step 4: Simplify right side
   10,121x = 455,491,635.06
5. Step 5: Solve for x
   x = 455,491,635.06/10,121
6. Step 6: Final answer
   x = 45,004.61