Finding the Fourth Proportional to 2,839.94, 3,921.03 and 1,778.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,839.94 : 3,921.03 = 1,778.12 : x
2. Step 2: Convert to fraction form
   2,839.94/3,921.03 = 1,778.12/x
3. Step 3: Cross multiply
   2,839.94x = 3,921.03 × 1,778.12
4. Step 4: Simplify right side
   2,839.94x = 6,972,061.86
5. Step 5: Solve for x
   x = 6,972,061.86/2,839.94
6. Step 6: Final answer
   x = 2,455.00