Finding the Fourth Proportional to 1,116.39, 1,540.55 and 619.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.39 : 1,540.55 = 619.01 : x
2. Step 2: Convert to fraction form
   1,116.39/1,540.55 = 619.01/x
3. Step 3: Cross multiply
   1,116.39x = 1,540.55 × 619.01
4. Step 4: Simplify right side
   1,116.39x = 953,615.86
5. Step 5: Solve for x
   x = 953,615.86/1,116.39
6. Step 6: Final answer
   x = 854.20