Finding the Third Proportional to 8,191.88 and 12,355.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,191.88 : 12,355.69 = 12,355.69 : x
2. Step 2: Convert to fraction form
   8,191.88/12,355.69 = 12,355.69/x
3. Step 3: Cross multiply
   8,191.88x = 12,355.69 × 12,355.69
4. Step 4: Simplify right side
   8,191.88x = 152,663,013.60
5. Step 5: Solve for x
   x = 152,663,013.60/8,191.88
6. Step 6: Final answer
   x = 18,635.91