Finding the Fourth Proportional to 1,571.05, 2,167.15 and 1,002.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,571.05 : 2,167.15 = 1,002.81 : x
2. Step 2: Convert to fraction form
   1,571.05/2,167.15 = 1,002.81/x
3. Step 3: Cross multiply
   1,571.05x = 2,167.15 × 1,002.81
4. Step 4: Simplify right side
   1,571.05x = 2,173,239.69
5. Step 5: Solve for x
   x = 2,173,239.69/1,571.05
6. Step 6: Final answer
   x = 1,383.30