Finding the Fourth Proportional to 2,978.78, 4,464.45 and 1,880.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.78 : 4,464.45 = 1,880.69 : x
2. Step 2: Convert to fraction form
   2,978.78/4,464.45 = 1,880.69/x
3. Step 3: Cross multiply
   2,978.78x = 4,464.45 × 1,880.69
4. Step 4: Simplify right side
   2,978.78x = 8,396,224.15
5. Step 5: Solve for x
   x = 8,396,224.15/2,978.78
6. Step 6: Final answer
   x = 2,818.68