Finding the Fourth Proportional to 12,389.48, 18,560.46 and 7,695.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,389.48 : 18,560.46 = 7,695.56 : x
2. Step 2: Convert to fraction form
   12,389.48/18,560.46 = 7,695.56/x
3. Step 3: Cross multiply
   12,389.48x = 18,560.46 × 7,695.56
4. Step 4: Simplify right side
   12,389.48x = 142,833,133.56
5. Step 5: Solve for x
   x = 142,833,133.56/12,389.48
6. Step 6: Final answer
   x = 11,528.58