Finding the Fourth Proportional to 1,621.50, 2,238.02 and 1,031.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,621.50 : 2,238.02 = 1,031.91 : x
2. Step 2: Convert to fraction form
   1,621.50/2,238.02 = 1,031.91/x
3. Step 3: Cross multiply
   1,621.50x = 2,238.02 × 1,031.91
4. Step 4: Simplify right side
   1,621.50x = 2,309,435.22
5. Step 5: Solve for x
   x = 2,309,435.22/1,621.50
6. Step 6: Final answer
   x = 1,424.26