Finding the Fourth Proportional to 2,128.85, 2,938.61 and 1,244.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.85 : 2,938.61 = 1,244.93 : x
2. Step 2: Convert to fraction form
   2,128.85/2,938.61 = 1,244.93/x
3. Step 3: Cross multiply
   2,128.85x = 2,938.61 × 1,244.93
4. Step 4: Simplify right side
   2,128.85x = 3,658,357.52
5. Step 5: Solve for x
   x = 3,658,357.52/2,128.85
6. Step 6: Final answer
   x = 1,718.47