Finding the Fourth Proportional to 9,210.61, 13,804.35 and 3,939.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,210.61 : 13,804.35 = 3,939.42 : x
2. Step 2: Convert to fraction form
   9,210.61/13,804.35 = 3,939.42/x
3. Step 3: Cross multiply
   9,210.61x = 13,804.35 × 3,939.42
4. Step 4: Simplify right side
   9,210.61x = 54,381,139.86
5. Step 5: Solve for x
   x = 54,381,139.86/9,210.61
6. Step 6: Final answer
   x = 5,904.19