Finding the Third Proportional to 8,188 and 12,359.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,188 : 12,359.88 = 12,359.88 : x
2. Step 2: Convert to fraction form
   8,188/12,359.88 = 12,359.88/x
3. Step 3: Cross multiply
   8,188x = 12,359.88 × 12,359.88
4. Step 4: Simplify right side
   8,188x = 152,766,510.02
5. Step 5: Solve for x
   x = 152,766,510.02/8,188
6. Step 6: Final answer
   x = 18,657.37