Finding the Fourth Proportional to 2,666.52, 3,679.78 and 1,604.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,666.52 : 3,679.78 = 1,604.90 : x
2. Step 2: Convert to fraction form
   2,666.52/3,679.78 = 1,604.90/x
3. Step 3: Cross multiply
   2,666.52x = 3,679.78 × 1,604.90
4. Step 4: Simplify right side
   2,666.52x = 5,905,660.52
5. Step 5: Solve for x
   x = 5,905,660.52/2,666.52
6. Step 6: Final answer
   x = 2,214.75