Finding the Fourth Proportional to 1,667.36, 2,498.88 and 800.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.36 : 2,498.88 = 800.96 : x
2. Step 2: Convert to fraction form
   1,667.36/2,498.88 = 800.96/x
3. Step 3: Cross multiply
   1,667.36x = 2,498.88 × 800.96
4. Step 4: Simplify right side
   1,667.36x = 2,001,502.92
5. Step 5: Solve for x
   x = 2,001,502.92/1,667.36
6. Step 6: Final answer
   x = 1,200.40