Finding the Third Proportional to 15,886.13 and 21,080.25

Step by Step Solution

1. Step 1: Write the proportion equation
   15,886.13 : 21,080.25 = 21,080.25 : x
2. Step 2: Convert to fraction form
   15,886.13/21,080.25 = 21,080.25/x
3. Step 3: Cross multiply
   15,886.13x = 21,080.25 × 21,080.25
4. Step 4: Simplify right side
   15,886.13x = 444,376,940.06
5. Step 5: Solve for x
   x = 444,376,940.06/15,886.13
6. Step 6: Final answer
   x = 27,972.65