Finding the Third Proportional to 8,386.88 and 12,580.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,386.88 : 12,580.31 = 12,580.31 : x
2. Step 2: Convert to fraction form
   8,386.88/12,580.31 = 12,580.31/x
3. Step 3: Cross multiply
   8,386.88x = 12,580.31 × 12,580.31
4. Step 4: Simplify right side
   8,386.88x = 158,264,262.60
5. Step 5: Solve for x
   x = 158,264,262.60/8,386.88
6. Step 6: Final answer
   x = 18,870.47