Finding the Fourth Proportional to 2,081.52, 3,123.36 and 928.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.52 : 3,123.36 = 928.08 : x
2. Step 2: Convert to fraction form
   2,081.52/3,123.36 = 928.08/x
3. Step 3: Cross multiply
   2,081.52x = 3,123.36 × 928.08
4. Step 4: Simplify right side
   2,081.52x = 2,898,727.95
5. Step 5: Solve for x
   x = 2,898,727.95/2,081.52
6. Step 6: Final answer
   x = 1,392.60