Finding the Fourth Proportional to 1,392.89, 1,917.81 and 1,182.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.89 : 1,917.81 = 1,182.65 : x
2. Step 2: Convert to fraction form
   1,392.89/1,917.81 = 1,182.65/x
3. Step 3: Cross multiply
   1,392.89x = 1,917.81 × 1,182.65
4. Step 4: Simplify right side
   1,392.89x = 2,268,088.41
5. Step 5: Solve for x
   x = 2,268,088.41/1,392.89
6. Step 6: Final answer
   x = 1,628.34