Finding the Third Proportional to 12,499.78 and 26,404.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,499.78 : 26,404.69 = 26,404.69 : x
2. Step 2: Convert to fraction form
   12,499.78/26,404.69 = 26,404.69/x
3. Step 3: Cross multiply
   12,499.78x = 26,404.69 × 26,404.69
4. Step 4: Simplify right side
   12,499.78x = 697,207,521.97
5. Step 5: Solve for x
   x = 697,207,521.97/12,499.78
6. Step 6: Final answer
   x = 55,777.58