Finding the Fourth Proportional to 1,067.49, 1,472.72 and 788.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,067.49 : 1,472.72 = 788.39 : x
2. Step 2: Convert to fraction form
   1,067.49/1,472.72 = 788.39/x
3. Step 3: Cross multiply
   1,067.49x = 1,472.72 × 788.39
4. Step 4: Simplify right side
   1,067.49x = 1,161,070.36
5. Step 5: Solve for x
   x = 1,161,070.36/1,067.49
6. Step 6: Final answer
   x = 1,087.67