Finding the Third Proportional to 3,886.31 and 8,288.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886.31 : 8,288.16 = 8,288.16 : x
2. Step 2: Convert to fraction form
   3,886.31/8,288.16 = 8,288.16/x
3. Step 3: Cross multiply
   3,886.31x = 8,288.16 × 8,288.16
4. Step 4: Simplify right side
   3,886.31x = 68,693,534.02
5. Step 5: Solve for x
   x = 68,693,534.02/3,886.31
6. Step 6: Final answer
   x = 17,675.76