Finding the Fourth Proportional to 2,439.74, 3,366.89 and 1,377.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,439.74 : 3,366.89 = 1,377.72 : x
2. Step 2: Convert to fraction form
   2,439.74/3,366.89 = 1,377.72/x
3. Step 3: Cross multiply
   2,439.74x = 3,366.89 × 1,377.72
4. Step 4: Simplify right side
   2,439.74x = 4,638,624.80
5. Step 5: Solve for x
   x = 4,638,624.80/2,439.74
6. Step 6: Final answer
   x = 1,901.28