Finding the Fourth Proportional to 2,555.12, 3,831.69 and 994.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,555.12 : 3,831.69 = 994.91 : x
2. Step 2: Convert to fraction form
   2,555.12/3,831.69 = 994.91/x
3. Step 3: Cross multiply
   2,555.12x = 3,831.69 × 994.91
4. Step 4: Simplify right side
   2,555.12x = 3,812,192.82
5. Step 5: Solve for x
   x = 3,812,192.82/2,555.12
6. Step 6: Final answer
   x = 1,491.98