Finding the Fourth Proportional to 1,116.42, 1,540.56 and 619.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.42 : 1,540.56 = 619.02 : x
2. Step 2: Convert to fraction form
   1,116.42/1,540.56 = 619.02/x
3. Step 3: Cross multiply
   1,116.42x = 1,540.56 × 619.02
4. Step 4: Simplify right side
   1,116.42x = 953,637.45
5. Step 5: Solve for x
   x = 953,637.45/1,116.42
6. Step 6: Final answer
   x = 854.19