Finding the Fourth Proportional to 1,067.67, 1,601.55 and 520.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,067.67 : 1,601.55 = 520.34 : x
2. Step 2: Convert to fraction form
   1,067.67/1,601.55 = 520.34/x
3. Step 3: Cross multiply
   1,067.67x = 1,601.55 × 520.34
4. Step 4: Simplify right side
   1,067.67x = 833,342.52
5. Step 5: Solve for x
   x = 833,342.52/1,067.67
6. Step 6: Final answer
   x = 780.52