Finding the Fourth Proportional to 2,021.91, 3,031.89 and 705.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.91 : 3,031.89 = 705.63 : x
2. Step 2: Convert to fraction form
   2,021.91/3,031.89 = 705.63/x
3. Step 3: Cross multiply
   2,021.91x = 3,031.89 × 705.63
4. Step 4: Simplify right side
   2,021.91x = 2,139,392.54
5. Step 5: Solve for x
   x = 2,139,392.54/2,021.91
6. Step 6: Final answer
   x = 1,058.10