Finding the Fourth Proportional to 2,128.40, 2,934.56 and 1,833.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.40 : 2,934.56 = 1,833.12 : x
2. Step 2: Convert to fraction form
   2,128.40/2,934.56 = 1,833.12/x
3. Step 3: Cross multiply
   2,128.40x = 2,934.56 × 1,833.12
4. Step 4: Simplify right side
   2,128.40x = 5,379,400.63
5. Step 5: Solve for x
   x = 5,379,400.63/2,128.40
6. Step 6: Final answer
   x = 2,527.44