Finding the Fourth Proportional to 1,085.34, 1,629.64 and 1,047.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.34 : 1,629.64 = 1,047.54 : x
2. Step 2: Convert to fraction form
   1,085.34/1,629.64 = 1,047.54/x
3. Step 3: Cross multiply
   1,085.34x = 1,629.64 × 1,047.54
4. Step 4: Simplify right side
   1,085.34x = 1,707,113.09
5. Step 5: Solve for x
   x = 1,707,113.09/1,085.34
6. Step 6: Final answer
   x = 1,572.88