Finding the Fourth Proportional to 9,685.86, 14,530.35 and 4,139.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,685.86 : 14,530.35 = 4,139.25 : x
2. Step 2: Convert to fraction form
   9,685.86/14,530.35 = 4,139.25/x
3. Step 3: Cross multiply
   9,685.86x = 14,530.35 × 4,139.25
4. Step 4: Simplify right side
   9,685.86x = 60,144,751.24
5. Step 5: Solve for x
   x = 60,144,751.24/9,685.86
6. Step 6: Final answer
   x = 6,209.54