Finding the Fourth Proportional to 8,760.86, 13,134.20 and 5,980.54

Step by Step Solution

1. Step 1: Write the proportion equation
   8,760.86 : 13,134.20 = 5,980.54 : x
2. Step 2: Convert to fraction form
   8,760.86/13,134.20 = 5,980.54/x
3. Step 3: Cross multiply
   8,760.86x = 13,134.20 × 5,980.54
4. Step 4: Simplify right side
   8,760.86x = 78,549,608.47
5. Step 5: Solve for x
   x = 78,549,608.47/8,760.86
6. Step 6: Final answer
   x = 8,965.97