Finding the Fourth Proportional to 9,365.49, 12,923.42 and 5,385.83

Step by Step Solution

1. Step 1: Write the proportion equation
   9,365.49 : 12,923.42 = 5,385.83 : x
2. Step 2: Convert to fraction form
   9,365.49/12,923.42 = 5,385.83/x
3. Step 3: Cross multiply
   9,365.49x = 12,923.42 × 5,385.83
4. Step 4: Simplify right side
   9,365.49x = 69,603,251.59
5. Step 5: Solve for x
   x = 69,603,251.59/9,365.49
6. Step 6: Final answer
   x = 7,431.89