Finding the Third Proportional to 11,915.72 and 25,906.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,915.72 : 25,906.78 = 25,906.78 : x
2. Step 2: Convert to fraction form
   11,915.72/25,906.78 = 25,906.78/x
3. Step 3: Cross multiply
   11,915.72x = 25,906.78 × 25,906.78
4. Step 4: Simplify right side
   11,915.72x = 671,161,314.74
5. Step 5: Solve for x
   x = 671,161,314.74/11,915.72
6. Step 6: Final answer
   x = 56,325.71