Finding the Fourth Proportional to 1,116.49, 1,540.75 and 619.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.49 : 1,540.75 = 619.15 : x
2. Step 2: Convert to fraction form
   1,116.49/1,540.75 = 619.15/x
3. Step 3: Cross multiply
   1,116.49x = 1,540.75 × 619.15
4. Step 4: Simplify right side
   1,116.49x = 953,944.56
5. Step 5: Solve for x
   x = 953,944.56/1,116.49
6. Step 6: Final answer
   x = 854.42