Finding the Fourth Proportional to 2,118.71, 2,923.81 and 1,174.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.71 : 2,923.81 = 1,174.55 : x
2. Step 2: Convert to fraction form
   2,118.71/2,923.81 = 1,174.55/x
3. Step 3: Cross multiply
   2,118.71x = 2,923.81 × 1,174.55
4. Step 4: Simplify right side
   2,118.71x = 3,434,161.04
5. Step 5: Solve for x
   x = 3,434,161.04/2,118.71
6. Step 6: Final answer
   x = 1,620.87