Finding the Fourth Proportional to 12,436.02, 18,644.72 and 7,504.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,436.02 : 18,644.72 = 7,504.49 : x
2. Step 2: Convert to fraction form
   12,436.02/18,644.72 = 7,504.49/x
3. Step 3: Cross multiply
   12,436.02x = 18,644.72 × 7,504.49
4. Step 4: Simplify right side
   12,436.02x = 139,919,123.88
5. Step 5: Solve for x
   x = 139,919,123.88/12,436.02
6. Step 6: Final answer
   x = 11,251.12