Finding the Fourth Proportional to 1,667.79, 2,498.85 and 800.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.79 : 2,498.85 = 800.28 : x
2. Step 2: Convert to fraction form
   1,667.79/2,498.85 = 800.28/x
3. Step 3: Cross multiply
   1,667.79x = 2,498.85 × 800.28
4. Step 4: Simplify right side
   1,667.79x = 1,999,779.68
5. Step 5: Solve for x
   x = 1,999,779.68/1,667.79
6. Step 6: Final answer
   x = 1,199.06