Finding the Fourth Proportional to 2,665.98, 4,002.52 and 2,278.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.98 : 4,002.52 = 2,278.46 : x
2. Step 2: Convert to fraction form
   2,665.98/4,002.52 = 2,278.46/x
3. Step 3: Cross multiply
   2,665.98x = 4,002.52 × 2,278.46
4. Step 4: Simplify right side
   2,665.98x = 9,119,581.72
5. Step 5: Solve for x
   x = 9,119,581.72/2,665.98
6. Step 6: Final answer
   x = 3,420.72