Finding the Fourth Proportional to 2,633.67, 3,951.16 and 784.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,633.67 : 3,951.16 = 784.78 : x
2. Step 2: Convert to fraction form
   2,633.67/3,951.16 = 784.78/x
3. Step 3: Cross multiply
   2,633.67x = 3,951.16 × 784.78
4. Step 4: Simplify right side
   2,633.67x = 3,100,779.50
5. Step 5: Solve for x
   x = 3,100,779.50/2,633.67
6. Step 6: Final answer
   x = 1,177.36