Finding the Third Proportional to 10,221.19 and 21,358.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,221.19 : 21,358.69 = 21,358.69 : x
2. Step 2: Convert to fraction form
   10,221.19/21,358.69 = 21,358.69/x
3. Step 3: Cross multiply
   10,221.19x = 21,358.69 × 21,358.69
4. Step 4: Simplify right side
   10,221.19x = 456,193,531.72
5. Step 5: Solve for x
   x = 456,193,531.72/10,221.19
6. Step 6: Final answer
   x = 44,632.15