Finding the Fourth Proportional to 2,633.61, 3,951.15 and 784.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,633.61 : 3,951.15 = 784.71 : x
2. Step 2: Convert to fraction form
   2,633.61/3,951.15 = 784.71/x
3. Step 3: Cross multiply
   2,633.61x = 3,951.15 × 784.71
4. Step 4: Simplify right side
   2,633.61x = 3,100,506.92
5. Step 5: Solve for x
   x = 3,100,506.92/2,633.61
6. Step 6: Final answer
   x = 1,177.28