Finding the Fourth Proportional to 1,667.20, 2,499.09 and 842.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.20 : 2,499.09 = 842.97 : x
2. Step 2: Convert to fraction form
   1,667.20/2,499.09 = 842.97/x
3. Step 3: Cross multiply
   1,667.20x = 2,499.09 × 842.97
4. Step 4: Simplify right side
   1,667.20x = 2,106,657.90
5. Step 5: Solve for x
   x = 2,106,657.90/1,667.20
6. Step 6: Final answer
   x = 1,263.59