Finding the Fourth Proportional to 2,784.86, 4,177.69 and 836.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,784.86 : 4,177.69 = 836.81 : x
2. Step 2: Convert to fraction form
   2,784.86/4,177.69 = 836.81/x
3. Step 3: Cross multiply
   2,784.86x = 4,177.69 × 836.81
4. Step 4: Simplify right side
   2,784.86x = 3,495,909.79
5. Step 5: Solve for x
   x = 3,495,909.79/2,784.86
6. Step 6: Final answer
   x = 1,255.33