Finding the Fourth Proportional to 13,323.89, 18,388.04 and 7,659.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,323.89 : 18,388.04 = 7,659.56 : x
2. Step 2: Convert to fraction form
   13,323.89/18,388.04 = 7,659.56/x
3. Step 3: Cross multiply
   13,323.89x = 18,388.04 × 7,659.56
4. Step 4: Simplify right side
   13,323.89x = 140,844,165.42
5. Step 5: Solve for x
   x = 140,844,165.42/13,323.89
6. Step 6: Final answer
   x = 10,570.80