Finding the Fourth Proportional to 13,608.32, 18,783.56 and 7,944.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,608.32 : 18,783.56 = 7,944.60 : x
2. Step 2: Convert to fraction form
   13,608.32/18,783.56 = 7,944.60/x
3. Step 3: Cross multiply
   13,608.32x = 18,783.56 × 7,944.60
4. Step 4: Simplify right side
   13,608.32x = 149,227,870.78
5. Step 5: Solve for x
   x = 149,227,870.78/13,608.32
6. Step 6: Final answer
   x = 10,965.93