Finding the Third Proportional to 12,613.25 and 18,919.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,613.25 : 18,919.88 = 18,919.88 : x
2. Step 2: Convert to fraction form
   12,613.25/18,919.88 = 18,919.88/x
3. Step 3: Cross multiply
   12,613.25x = 18,919.88 × 18,919.88
4. Step 4: Simplify right side
   12,613.25x = 357,961,670.02
5. Step 5: Solve for x
   x = 357,961,670.02/12,613.25
6. Step 6: Final answer
   x = 28,379.81