Finding the Fourth Proportional to 2,111.15, 2,913.39 and 1,179.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.15 : 2,913.39 = 1,179.65 : x
2. Step 2: Convert to fraction form
   2,111.15/2,913.39 = 1,179.65/x
3. Step 3: Cross multiply
   2,111.15x = 2,913.39 × 1,179.65
4. Step 4: Simplify right side
   2,111.15x = 3,436,780.51
5. Step 5: Solve for x
   x = 3,436,780.51/2,111.15
6. Step 6: Final answer
   x = 1,627.92