Finding the Fourth Proportional to 8,978.81, 12,398.01 and 5,793.68

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.81 : 12,398.01 = 5,793.68 : x
2. Step 2: Convert to fraction form
   8,978.81/12,398.01 = 5,793.68/x
3. Step 3: Cross multiply
   8,978.81x = 12,398.01 × 5,793.68
4. Step 4: Simplify right side
   8,978.81x = 71,830,040.59
5. Step 5: Solve for x
   x = 71,830,040.59/8,978.81
6. Step 6: Final answer
   x = 7,999.96