Finding the Fourth Proportional to 2,017.79, 2,784.50 and 1,178.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,017.79 : 2,784.50 = 1,178.56 : x
2. Step 2: Convert to fraction form
   2,017.79/2,784.50 = 1,178.56/x
3. Step 3: Cross multiply
   2,017.79x = 2,784.50 × 1,178.56
4. Step 4: Simplify right side
   2,017.79x = 3,281,700.32
5. Step 5: Solve for x
   x = 3,281,700.32/2,017.79
6. Step 6: Final answer
   x = 1,626.38