Finding the Fourth Proportional to 2,017.50, 2,784.30 and 1,178.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,017.50 : 2,784.30 = 1,178.76 : x
2. Step 2: Convert to fraction form
   2,017.50/2,784.30 = 1,178.76/x
3. Step 3: Cross multiply
   2,017.50x = 2,784.30 × 1,178.76
4. Step 4: Simplify right side
   2,017.50x = 3,282,021.47
5. Step 5: Solve for x
   x = 3,282,021.47/2,017.50
6. Step 6: Final answer
   x = 1,626.78