Finding the Third Proportional to 9,861.75 and 21,080.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,861.75 : 21,080.25 = 21,080.25 : x
2. Step 2: Convert to fraction form
   9,861.75/21,080.25 = 21,080.25/x
3. Step 3: Cross multiply
   9,861.75x = 21,080.25 × 21,080.25
4. Step 4: Simplify right side
   9,861.75x = 444,376,940.06
5. Step 5: Solve for x
   x = 444,376,940.06/9,861.75
6. Step 6: Final answer
   x = 45,060.66