Finding the Fourth Proportional to 1,667.62, 2,300.55 and 1,078.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.62 : 2,300.55 = 1,078.35 : x
2. Step 2: Convert to fraction form
   1,667.62/2,300.55 = 1,078.35/x
3. Step 3: Cross multiply
   1,667.62x = 2,300.55 × 1,078.35
4. Step 4: Simplify right side
   1,667.62x = 2,480,791.49
5. Step 5: Solve for x
   x = 2,480,791.49/1,667.62
6. Step 6: Final answer
   x = 1,487.62