Finding the Fourth Proportional to 2,031.38, 2,802.22 and 1,285.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,031.38 : 2,802.22 = 1,285.07 : x
2. Step 2: Convert to fraction form
   2,031.38/2,802.22 = 1,285.07/x
3. Step 3: Cross multiply
   2,031.38x = 2,802.22 × 1,285.07
4. Step 4: Simplify right side
   2,031.38x = 3,601,052.65
5. Step 5: Solve for x
   x = 3,601,052.65/2,031.38
6. Step 6: Final answer
   x = 1,772.72