Finding the Fourth Proportional to 2,219.86, 3,328.82 and 1,179.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,219.86 : 3,328.82 = 1,179.61 : x
2. Step 2: Convert to fraction form
   2,219.86/3,328.82 = 1,179.61/x
3. Step 3: Cross multiply
   2,219.86x = 3,328.82 × 1,179.61
4. Step 4: Simplify right side
   2,219.86x = 3,926,708.93
5. Step 5: Solve for x
   x = 3,926,708.93/2,219.86
6. Step 6: Final answer
   x = 1,768.90