Finding the Fourth Proportional to 2,778.18, 3,831.28 and 2,071.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,778.18 : 3,831.28 = 2,071.59 : x
2. Step 2: Convert to fraction form
   2,778.18/3,831.28 = 2,071.59/x
3. Step 3: Cross multiply
   2,778.18x = 3,831.28 × 2,071.59
4. Step 4: Simplify right side
   2,778.18x = 7,936,841.34
5. Step 5: Solve for x
   x = 7,936,841.34/2,778.18
6. Step 6: Final answer
   x = 2,856.85