Finding the Fourth Proportional to 1,116.52, 1,540.71 and 619.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.52 : 1,540.71 = 619.18 : x
2. Step 2: Convert to fraction form
   1,116.52/1,540.71 = 619.18/x
3. Step 3: Cross multiply
   1,116.52x = 1,540.71 × 619.18
4. Step 4: Simplify right side
   1,116.52x = 953,976.82
5. Step 5: Solve for x
   x = 953,976.82/1,116.52
6. Step 6: Final answer
   x = 854.42