Finding the Fourth Proportional to 2,785.86, 4,179.95 and 1,225.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,785.86 : 4,179.95 = 1,225.05 : x
2. Step 2: Convert to fraction form
   2,785.86/4,179.95 = 1,225.05/x
3. Step 3: Cross multiply
   2,785.86x = 4,179.95 × 1,225.05
4. Step 4: Simplify right side
   2,785.86x = 5,120,641.62
5. Step 5: Solve for x
   x = 5,120,641.62/2,785.86
6. Step 6: Final answer
   x = 1,838.08