Finding the Fourth Proportional to 5,316.46, 7,978.91 and 2,976.03

Step by Step Solution

1. Step 1: Write the proportion equation
   5,316.46 : 7,978.91 = 2,976.03 : x
2. Step 2: Convert to fraction form
   5,316.46/7,978.91 = 2,976.03/x
3. Step 3: Cross multiply
   5,316.46x = 7,978.91 × 2,976.03
4. Step 4: Simplify right side
   5,316.46x = 23,745,449.43
5. Step 5: Solve for x
   x = 23,745,449.43/5,316.46
6. Step 6: Final answer
   x = 4,466.40