Finding the Fourth Proportional to 12,384.72, 18,572.24 and 4,485.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,384.72 : 18,572.24 = 4,485.36 : x
2. Step 2: Convert to fraction form
   12,384.72/18,572.24 = 4,485.36/x
3. Step 3: Cross multiply
   12,384.72x = 18,572.24 × 4,485.36
4. Step 4: Simplify right side
   12,384.72x = 83,303,182.41
5. Step 5: Solve for x
   x = 83,303,182.41/12,384.72
6. Step 6: Final answer
   x = 6,726.29