Finding the Fourth Proportional to 11,601.55, 16,009.25 and 6,821.69

Step by Step Solution

1. Step 1: Write the proportion equation
   11,601.55 : 16,009.25 = 6,821.69 : x
2. Step 2: Convert to fraction form
   11,601.55/16,009.25 = 6,821.69/x
3. Step 3: Cross multiply
   11,601.55x = 16,009.25 × 6,821.69
4. Step 4: Simplify right side
   11,601.55x = 109,210,026.48
5. Step 5: Solve for x
   x = 109,210,026.48/11,601.55
6. Step 6: Final answer
   x = 9,413.40