Finding the Fourth Proportional to 2,657.74, 3,667.79 and 1,478.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,657.74 : 3,667.79 = 1,478.78 : x
2. Step 2: Convert to fraction form
   2,657.74/3,667.79 = 1,478.78/x
3. Step 3: Cross multiply
   2,657.74x = 3,667.79 × 1,478.78
4. Step 4: Simplify right side
   2,657.74x = 5,423,863.67
5. Step 5: Solve for x
   x = 5,423,863.67/2,657.74
6. Step 6: Final answer
   x = 2,040.78