Finding the Fourth Proportional to 1,817.21, 2,507.83 and 1,031.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,817.21 : 2,507.83 = 1,031.33 : x
2. Step 2: Convert to fraction form
   1,817.21/2,507.83 = 1,031.33/x
3. Step 3: Cross multiply
   1,817.21x = 2,507.83 × 1,031.33
4. Step 4: Simplify right side
   1,817.21x = 2,586,388.89
5. Step 5: Solve for x
   x = 2,586,388.89/1,817.21
6. Step 6: Final answer
   x = 1,423.28