Finding the Fourth Proportional to 13,170.59, 19,766.27 and 5,780.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,170.59 : 19,766.27 = 5,780.15 : x
2. Step 2: Convert to fraction form
   13,170.59/19,766.27 = 5,780.15/x
3. Step 3: Cross multiply
   13,170.59x = 19,766.27 × 5,780.15
4. Step 4: Simplify right side
   13,170.59x = 114,252,005.54
5. Step 5: Solve for x
   x = 114,252,005.54/13,170.59
6. Step 6: Final answer
   x = 8,674.78