Finding the Fourth Proportional to 2,071.22, 2,857.01 and 1,231.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.22 : 2,857.01 = 1,231.35 : x
2. Step 2: Convert to fraction form
   2,071.22/2,857.01 = 1,231.35/x
3. Step 3: Cross multiply
   2,071.22x = 2,857.01 × 1,231.35
4. Step 4: Simplify right side
   2,071.22x = 3,517,962.39
5. Step 5: Solve for x
   x = 3,517,962.39/2,071.22
6. Step 6: Final answer
   x = 1,698.50