Finding the Fourth Proportional to 12,427.37, 18,644.29 and 7,528.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,427.37 : 18,644.29 = 7,528.49 : x
2. Step 2: Convert to fraction form
   12,427.37/18,644.29 = 7,528.49/x
3. Step 3: Cross multiply
   12,427.37x = 18,644.29 × 7,528.49
4. Step 4: Simplify right side
   12,427.37x = 140,363,238.78
5. Step 5: Solve for x
   x = 140,363,238.78/12,427.37
6. Step 6: Final answer
   x = 11,294.69