Finding the Fourth Proportional to 1,667.28, 2,498.19 and 571.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.28 : 2,498.19 = 571.05 : x
2. Step 2: Convert to fraction form
   1,667.28/2,498.19 = 571.05/x
3. Step 3: Cross multiply
   1,667.28x = 2,498.19 × 571.05
4. Step 4: Simplify right side
   1,667.28x = 1,426,589.26
5. Step 5: Solve for x
   x = 1,426,589.26/1,667.28
6. Step 6: Final answer
   x = 855.64