Finding the Fourth Proportional to 1,408.94, 1,943.16 and 1,031.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.94 : 1,943.16 = 1,031.30 : x
2. Step 2: Convert to fraction form
   1,408.94/1,943.16 = 1,031.30/x
3. Step 3: Cross multiply
   1,408.94x = 1,943.16 × 1,031.30
4. Step 4: Simplify right side
   1,408.94x = 2,003,980.91
5. Step 5: Solve for x
   x = 2,003,980.91/1,408.94
6. Step 6: Final answer
   x = 1,422.33