Finding the Third Proportional to 9,864.28 and 21,368.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,864.28 : 21,368.81 = 21,368.81 : x
2. Step 2: Convert to fraction form
   9,864.28/21,368.81 = 21,368.81/x
3. Step 3: Cross multiply
   9,864.28x = 21,368.81 × 21,368.81
4. Step 4: Simplify right side
   9,864.28x = 456,626,147.66
5. Step 5: Solve for x
   x = 456,626,147.66/9,864.28
6. Step 6: Final answer
   x = 46,290.87