Finding the Fourth Proportional to 2,118.78, 2,923.63 and 1,174.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.78 : 2,923.63 = 1,174.52 : x
2. Step 2: Convert to fraction form
   2,118.78/2,923.63 = 1,174.52/x
3. Step 3: Cross multiply
   2,118.78x = 2,923.63 × 1,174.52
4. Step 4: Simplify right side
   2,118.78x = 3,433,854.60
5. Step 5: Solve for x
   x = 3,433,854.60/2,118.78
6. Step 6: Final answer
   x = 1,620.68