Finding the Fourth Proportional to 13,321.76, 18,383.03 and 7,656.51

Step by Step Solution

1. Step 1: Write the proportion equation
   13,321.76 : 18,383.03 = 7,656.51 : x
2. Step 2: Convert to fraction form
   13,321.76/18,383.03 = 7,656.51/x
3. Step 3: Cross multiply
   13,321.76x = 18,383.03 × 7,656.51
4. Step 4: Simplify right side
   13,321.76x = 140,749,912.39
5. Step 5: Solve for x
   x = 140,749,912.39/13,321.76
6. Step 6: Final answer
   x = 10,565.42