Finding the Fourth Proportional to 1,091.58, 1,506.12 and 619.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,091.58 : 1,506.12 = 619.42 : x
2. Step 2: Convert to fraction form
   1,091.58/1,506.12 = 619.42/x
3. Step 3: Cross multiply
   1,091.58x = 1,506.12 × 619.42
4. Step 4: Simplify right side
   1,091.58x = 932,920.85
5. Step 5: Solve for x
   x = 932,920.85/1,091.58
6. Step 6: Final answer
   x = 854.65