Finding the Fourth Proportional to 10,208.77, 14,077.72 and 9,613.48

Step by Step Solution

1. Step 1: Write the proportion equation
   10,208.77 : 14,077.72 = 9,613.48 : x
2. Step 2: Convert to fraction form
   10,208.77/14,077.72 = 9,613.48/x
3. Step 3: Cross multiply
   10,208.77x = 14,077.72 × 9,613.48
4. Step 4: Simplify right side
   10,208.77x = 135,335,879.67
5. Step 5: Solve for x
   x = 135,335,879.67/10,208.77
6. Step 6: Final answer
   x = 13,256.83