Finding the Fourth Proportional to 12,454.89, 17,187.55 and 6,789.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,454.89 : 17,187.55 = 6,789.86 : x
2. Step 2: Convert to fraction form
   12,454.89/17,187.55 = 6,789.86/x
3. Step 3: Cross multiply
   12,454.89x = 17,187.55 × 6,789.86
4. Step 4: Simplify right side
   12,454.89x = 116,701,084.24
5. Step 5: Solve for x
   x = 116,701,084.24/12,454.89
6. Step 6: Final answer
   x = 9,369.90