Finding the Fourth Proportional to 2,079.77, 3,117.78 and 762.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.77 : 3,117.78 = 762.59 : x
2. Step 2: Convert to fraction form
   2,079.77/3,117.78 = 762.59/x
3. Step 3: Cross multiply
   2,079.77x = 3,117.78 × 762.59
4. Step 4: Simplify right side
   2,079.77x = 2,377,595.64
5. Step 5: Solve for x
   x = 2,377,595.64/2,079.77
6. Step 6: Final answer
   x = 1,143.20