Finding the Fourth Proportional to 1,667.56, 2,496.72 and 841.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.56 : 2,496.72 = 841.79 : x
2. Step 2: Convert to fraction form
   1,667.56/2,496.72 = 841.79/x
3. Step 3: Cross multiply
   1,667.56x = 2,496.72 × 841.79
4. Step 4: Simplify right side
   1,667.56x = 2,101,723.33
5. Step 5: Solve for x
   x = 2,101,723.33/1,667.56
6. Step 6: Final answer
   x = 1,260.36