Finding the Fourth Proportional to 2,426.72, 3,349.32 and 1,378.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,426.72 : 3,349.32 = 1,378.64 : x
2. Step 2: Convert to fraction form
   2,426.72/3,349.32 = 1,378.64/x
3. Step 3: Cross multiply
   2,426.72x = 3,349.32 × 1,378.64
4. Step 4: Simplify right side
   2,426.72x = 4,617,506.52
5. Step 5: Solve for x
   x = 4,617,506.52/2,426.72
6. Step 6: Final answer
   x = 1,902.78