Finding the Third Proportional to 12,876.47 and 18,378.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,876.47 : 18,378.56 = 18,378.56 : x
2. Step 2: Convert to fraction form
   12,876.47/18,378.56 = 18,378.56/x
3. Step 3: Cross multiply
   12,876.47x = 18,378.56 × 18,378.56
4. Step 4: Simplify right side
   12,876.47x = 337,771,559.57
5. Step 5: Solve for x
   x = 337,771,559.57/12,876.47
6. Step 6: Final answer
   x = 26,231.69