Finding the Fourth Proportional to 1,085.55, 1,616.76 and 1,047.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.55 : 1,616.76 = 1,047.29 : x
2. Step 2: Convert to fraction form
   1,085.55/1,616.76 = 1,047.29/x
3. Step 3: Cross multiply
   1,085.55x = 1,616.76 × 1,047.29
4. Step 4: Simplify right side
   1,085.55x = 1,693,208.50
5. Step 5: Solve for x
   x = 1,693,208.50/1,085.55
6. Step 6: Final answer
   x = 1,559.77