Finding the Fourth Proportional to 8,978.86, 12,386.37 and 5,998.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.86 : 12,386.37 = 5,998.69 : x
2. Step 2: Convert to fraction form
   8,978.86/12,386.37 = 5,998.69/x
3. Step 3: Cross multiply
   8,978.86x = 12,386.37 × 5,998.69
4. Step 4: Simplify right side
   8,978.86x = 74,301,993.86
5. Step 5: Solve for x
   x = 74,301,993.86/8,978.86
6. Step 6: Final answer
   x = 8,275.21