Finding the Fourth Proportional to 2,641.86, 3,961.17 and 1,179

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.86 : 3,961.17 = 1,179 : x
2. Step 2: Convert to fraction form
   2,641.86/3,961.17 = 1,179/x
3. Step 3: Cross multiply
   2,641.86x = 3,961.17 × 1,179
4. Step 4: Simplify right side
   2,641.86x = 4,670,219.43
5. Step 5: Solve for x
   x = 4,670,219.43/2,641.86
6. Step 6: Final answer
   x = 1,767.78