Finding the Fourth Proportional to 2,081.39, 3,122.24 and 782.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.39 : 3,122.24 = 782.87 : x
2. Step 2: Convert to fraction form
   2,081.39/3,122.24 = 782.87/x
3. Step 3: Cross multiply
   2,081.39x = 3,122.24 × 782.87
4. Step 4: Simplify right side
   2,081.39x = 2,444,288.50
5. Step 5: Solve for x
   x = 2,444,288.50/2,081.39
6. Step 6: Final answer
   x = 1,174.36