Finding the Third Proportional to 12,478.78 and 27,144.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,478.78 : 27,144.42 = 27,144.42 : x
2. Step 2: Convert to fraction form
   12,478.78/27,144.42 = 27,144.42/x
3. Step 3: Cross multiply
   12,478.78x = 27,144.42 × 27,144.42
4. Step 4: Simplify right side
   12,478.78x = 736,819,638.93
5. Step 5: Solve for x
   x = 736,819,638.93/12,478.78
6. Step 6: Final answer
   x = 59,045.80