Finding the Fourth Proportional to 1,629.71, 2,449.52 and 1,085.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,629.71 : 2,449.52 = 1,085.21 : x
2. Step 2: Convert to fraction form
   1,629.71/2,449.52 = 1,085.21/x
3. Step 3: Cross multiply
   1,629.71x = 2,449.52 × 1,085.21
4. Step 4: Simplify right side
   1,629.71x = 2,658,225.93
5. Step 5: Solve for x
   x = 2,658,225.93/1,629.71
6. Step 6: Final answer
   x = 1,631.11