Finding the Fourth Proportional to 2,778.24, 4,164.12 and 1,236

Step by Step Solution

1. Step 1: Write the proportion equation
   2,778.24 : 4,164.12 = 1,236 : x
2. Step 2: Convert to fraction form
   2,778.24/4,164.12 = 1,236/x
3. Step 3: Cross multiply
   2,778.24x = 4,164.12 × 1,236
4. Step 4: Simplify right side
   2,778.24x = 5,146,852.32
5. Step 5: Solve for x
   x = 5,146,852.32/2,778.24
6. Step 6: Final answer
   x = 1,852.56