Finding the Third Proportional to 9,641.25 and 21,128.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,641.25 : 21,128.81 = 21,128.81 : x
2. Step 2: Convert to fraction form
   9,641.25/21,128.81 = 21,128.81/x
3. Step 3: Cross multiply
   9,641.25x = 21,128.81 × 21,128.81
4. Step 4: Simplify right side
   9,641.25x = 446,426,717.66
5. Step 5: Solve for x
   x = 446,426,717.66/9,641.25
6. Step 6: Final answer
   x = 46,303.82