Finding the Fourth Proportional to 2,171.82, 3,255.74 and 784.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,171.82 : 3,255.74 = 784.84 : x
2. Step 2: Convert to fraction form
   2,171.82/3,255.74 = 784.84/x
3. Step 3: Cross multiply
   2,171.82x = 3,255.74 × 784.84
4. Step 4: Simplify right side
   2,171.82x = 2,555,234.98
5. Step 5: Solve for x
   x = 2,555,234.98/2,171.82
6. Step 6: Final answer
   x = 1,176.54