Finding the Fourth Proportional to 2,081.96, 3,125.34 and 1,428.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.96 : 3,125.34 = 1,428.08 : x
2. Step 2: Convert to fraction form
   2,081.96/3,125.34 = 1,428.08/x
3. Step 3: Cross multiply
   2,081.96x = 3,125.34 × 1,428.08
4. Step 4: Simplify right side
   2,081.96x = 4,463,235.55
5. Step 5: Solve for x
   x = 4,463,235.55/2,081.96
6. Step 6: Final answer
   x = 2,143.77