Finding the Fourth Proportional to 1,667.38, 2,299.81 and 1,078.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.38 : 2,299.81 = 1,078.58 : x
2. Step 2: Convert to fraction form
   1,667.38/2,299.81 = 1,078.58/x
3. Step 3: Cross multiply
   1,667.38x = 2,299.81 × 1,078.58
4. Step 4: Simplify right side
   1,667.38x = 2,480,529.07
5. Step 5: Solve for x
   x = 2,480,529.07/1,667.38
6. Step 6: Final answer
   x = 1,487.68