Finding the Fourth Proportional to 1,067.31, 1,472.38 and 619.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,067.31 : 1,472.38 = 619.18 : x
2. Step 2: Convert to fraction form
   1,067.31/1,472.38 = 619.18/x
3. Step 3: Cross multiply
   1,067.31x = 1,472.38 × 619.18
4. Step 4: Simplify right side
   1,067.31x = 911,663.02
5. Step 5: Solve for x
   x = 911,663.02/1,067.31
6. Step 6: Final answer
   x = 854.17