Finding the Fourth Proportional to 1,067.86, 1,602.15 and 554.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,067.86 : 1,602.15 = 554.50 : x
2. Step 2: Convert to fraction form
   1,067.86/1,602.15 = 554.50/x
3. Step 3: Cross multiply
   1,067.86x = 1,602.15 × 554.50
4. Step 4: Simplify right side
   1,067.86x = 888,392.18
5. Step 5: Solve for x
   x = 888,392.18/1,067.86
6. Step 6: Final answer
   x = 831.94