Finding the Fourth Proportional to 2,426.57, 3,348.69 and 1,378.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,426.57 : 3,348.69 = 1,378.64 : x
2. Step 2: Convert to fraction form
   2,426.57/3,348.69 = 1,378.64/x
3. Step 3: Cross multiply
   2,426.57x = 3,348.69 × 1,378.64
4. Step 4: Simplify right side
   2,426.57x = 4,616,637.98
5. Step 5: Solve for x
   x = 4,616,637.98/2,426.57
6. Step 6: Final answer
   x = 1,902.54