Finding the Fourth Proportional to 2,081.59, 3,122.85 and 783.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.59 : 3,122.85 = 783.07 : x
2. Step 2: Convert to fraction form
   2,081.59/3,122.85 = 783.07/x
3. Step 3: Cross multiply
   2,081.59x = 3,122.85 × 783.07
4. Step 4: Simplify right side
   2,081.59x = 2,445,410.15
5. Step 5: Solve for x
   x = 2,445,410.15/2,081.59
6. Step 6: Final answer
   x = 1,174.78