Finding the Fourth Proportional to 1,116.43, 1,540.69 and 619.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.43 : 1,540.69 = 619.08 : x
2. Step 2: Convert to fraction form
   1,116.43/1,540.69 = 619.08/x
3. Step 3: Cross multiply
   1,116.43x = 1,540.69 × 619.08
4. Step 4: Simplify right side
   1,116.43x = 953,808.82
5. Step 5: Solve for x
   x = 953,808.82/1,116.43
6. Step 6: Final answer
   x = 854.34