Finding the Fourth Proportional to 1,116.57, 1,540.96 and 619.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.57 : 1,540.96 = 619.37 : x
2. Step 2: Convert to fraction form
   1,116.57/1,540.96 = 619.37/x
3. Step 3: Cross multiply
   1,116.57x = 1,540.96 × 619.37
4. Step 4: Simplify right side
   1,116.57x = 954,416.69
5. Step 5: Solve for x
   x = 954,416.69/1,116.57
6. Step 6: Final answer
   x = 854.78