Finding the Third Proportional to 10,430.25 and 21,222.75

Step by Step Solution

1. Step 1: Write the proportion equation
   10,430.25 : 21,222.75 = 21,222.75 : x
2. Step 2: Convert to fraction form
   10,430.25/21,222.75 = 21,222.75/x
3. Step 3: Cross multiply
   10,430.25x = 21,222.75 × 21,222.75
4. Step 4: Simplify right side
   10,430.25x = 450,405,117.56
5. Step 5: Solve for x
   x = 450,405,117.56/10,430.25
6. Step 6: Final answer
   x = 43,182.58