Finding the Third Proportional to 9,918 and 21,656.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,918 : 21,656.25 = 21,656.25 : x
2. Step 2: Convert to fraction form
   9,918/21,656.25 = 21,656.25/x
3. Step 3: Cross multiply
   9,918x = 21,656.25 × 21,656.25
4. Step 4: Simplify right side
   9,918x = 468,993,164.06
5. Step 5: Solve for x
   x = 468,993,164.06/9,918
6. Step 6: Final answer
   x = 47,287.07