Finding the Fourth Proportional to 1,086.75, 1,618.91 and 1,019.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.75 : 1,618.91 = 1,019.52 : x
2. Step 2: Convert to fraction form
   1,086.75/1,618.91 = 1,019.52/x
3. Step 3: Cross multiply
   1,086.75x = 1,618.91 × 1,019.52
4. Step 4: Simplify right side
   1,086.75x = 1,650,511.12
5. Step 5: Solve for x
   x = 1,650,511.12/1,086.75
6. Step 6: Final answer
   x = 1,518.76