Finding the Fourth Proportional to 2,666.61, 3,679.50 and 1,604.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,666.61 : 3,679.50 = 1,604.12 : x
2. Step 2: Convert to fraction form
   2,666.61/3,679.50 = 1,604.12/x
3. Step 3: Cross multiply
   2,666.61x = 3,679.50 × 1,604.12
4. Step 4: Simplify right side
   2,666.61x = 5,902,359.54
5. Step 5: Solve for x
   x = 5,902,359.54/2,666.61
6. Step 6: Final answer
   x = 2,213.43