Finding the Fourth Proportional to 2,081.16, 3,122.02 and 764.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.16 : 3,122.02 = 764.72 : x
2. Step 2: Convert to fraction form
   2,081.16/3,122.02 = 764.72/x
3. Step 3: Cross multiply
   2,081.16x = 3,122.02 × 764.72
4. Step 4: Simplify right side
   2,081.16x = 2,387,471.13
5. Step 5: Solve for x
   x = 2,387,471.13/2,081.16
6. Step 6: Final answer
   x = 1,147.18