Finding the Fourth Proportional to 2,061.28, 3,091.59 and 762.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,061.28 : 3,091.59 = 762.43 : x
2. Step 2: Convert to fraction form
   2,061.28/3,091.59 = 762.43/x
3. Step 3: Cross multiply
   2,061.28x = 3,091.59 × 762.43
4. Step 4: Simplify right side
   2,061.28x = 2,357,120.96
5. Step 5: Solve for x
   x = 2,357,120.96/2,061.28
6. Step 6: Final answer
   x = 1,143.52