Finding the Fourth Proportional to 1,392.64, 1,917.46 and 1,182.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.64 : 1,917.46 = 1,182.38 : x
2. Step 2: Convert to fraction form
   1,392.64/1,917.46 = 1,182.38/x
3. Step 3: Cross multiply
   1,392.64x = 1,917.46 × 1,182.38
4. Step 4: Simplify right side
   1,392.64x = 2,267,166.35
5. Step 5: Solve for x
   x = 2,267,166.35/1,392.64
6. Step 6: Final answer
   x = 1,627.96