Finding the Fourth Proportional to 10,639.51, 14,650.82 and 10,403.49

Step by Step Solution

1. Step 1: Write the proportion equation
   10,639.51 : 14,650.82 = 10,403.49 : x
2. Step 2: Convert to fraction form
   10,639.51/14,650.82 = 10,403.49/x
3. Step 3: Cross multiply
   10,639.51x = 14,650.82 × 10,403.49
4. Step 4: Simplify right side
   10,639.51x = 152,419,659.36
5. Step 5: Solve for x
   x = 152,419,659.36/10,639.51
6. Step 6: Final answer
   x = 14,325.82