Finding the Third Proportional to 15,817.78 and 25,894.69

Step by Step Solution

1. Step 1: Write the proportion equation
   15,817.78 : 25,894.69 = 25,894.69 : x
2. Step 2: Convert to fraction form
   15,817.78/25,894.69 = 25,894.69/x
3. Step 3: Cross multiply
   15,817.78x = 25,894.69 × 25,894.69
4. Step 4: Simplify right side
   15,817.78x = 670,534,840.72
5. Step 5: Solve for x
   x = 670,534,840.72/15,817.78
6. Step 6: Final answer
   x = 42,391.21