Finding the Fourth Proportional to 2,017.20, 3,025.96 and 784.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,017.20 : 3,025.96 = 784.51 : x
2. Step 2: Convert to fraction form
   2,017.20/3,025.96 = 784.51/x
3. Step 3: Cross multiply
   2,017.20x = 3,025.96 × 784.51
4. Step 4: Simplify right side
   2,017.20x = 2,373,894.86
5. Step 5: Solve for x
   x = 2,373,894.86/2,017.20
6. Step 6: Final answer
   x = 1,176.82