Finding the Fourth Proportional to 5,985.90, 8,978.18 and 2,288.05

Step by Step Solution

1. Step 1: Write the proportion equation
   5,985.90 : 8,978.18 = 2,288.05 : x
2. Step 2: Convert to fraction form
   5,985.90/8,978.18 = 2,288.05/x
3. Step 3: Cross multiply
   5,985.90x = 8,978.18 × 2,288.05
4. Step 4: Simplify right side
   5,985.90x = 20,542,490.86
5. Step 5: Solve for x
   x = 20,542,490.86/5,985.90
6. Step 6: Final answer
   x = 3,431.81