Finding the Third Proportional to 12,648.66 and 18,870.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,648.66 : 18,870.47 = 18,870.47 : x
2. Step 2: Convert to fraction form
   12,648.66/18,870.47 = 18,870.47/x
3. Step 3: Cross multiply
   12,648.66x = 18,870.47 × 18,870.47
4. Step 4: Simplify right side
   12,648.66x = 356,094,590.84
5. Step 5: Solve for x
   x = 356,094,590.84/12,648.66
6. Step 6: Final answer
   x = 28,152.76