Finding the Fourth Proportional to 5,978.96, 8,959.68 and 3,376.40

Step by Step Solution

1. Step 1: Write the proportion equation
   5,978.96 : 8,959.68 = 3,376.40 : x
2. Step 2: Convert to fraction form
   5,978.96/8,959.68 = 3,376.40/x
3. Step 3: Cross multiply
   5,978.96x = 8,959.68 × 3,376.40
4. Step 4: Simplify right side
   5,978.96x = 30,251,463.55
5. Step 5: Solve for x
   x = 30,251,463.55/5,978.96
6. Step 6: Final answer
   x = 5,059.65