Finding the Fourth Proportional to 2,778.91, 4,165.32 and 1,298.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,778.91 : 4,165.32 = 1,298.84 : x
2. Step 2: Convert to fraction form
   2,778.91/4,165.32 = 1,298.84/x
3. Step 3: Cross multiply
   2,778.91x = 4,165.32 × 1,298.84
4. Step 4: Simplify right side
   2,778.91x = 5,410,068.27
5. Step 5: Solve for x
   x = 5,410,068.27/2,778.91
6. Step 6: Final answer
   x = 1,946.83