Finding the Fourth Proportional to 1,969.73, 2,718.20 and 1,085.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,969.73 : 2,718.20 = 1,085.57 : x
2. Step 2: Convert to fraction form
   1,969.73/2,718.20 = 1,085.57/x
3. Step 3: Cross multiply
   1,969.73x = 2,718.20 × 1,085.57
4. Step 4: Simplify right side
   1,969.73x = 2,950,784.82
5. Step 5: Solve for x
   x = 2,950,784.82/1,969.73
6. Step 6: Final answer
   x = 1,498.06