Finding the Fourth Proportional to 2,666.09, 3,679.56 and 1,618.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,666.09 : 3,679.56 = 1,618.17 : x
2. Step 2: Convert to fraction form
   2,666.09/3,679.56 = 1,618.17/x
3. Step 3: Cross multiply
   2,666.09x = 3,679.56 × 1,618.17
4. Step 4: Simplify right side
   2,666.09x = 5,954,153.61
5. Step 5: Solve for x
   x = 5,954,153.61/2,666.09
6. Step 6: Final answer
   x = 2,233.29