Finding the Fourth Proportional to 12,259.40, 18,384.53 and 3,937.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,259.40 : 18,384.53 = 3,937.28 : x
2. Step 2: Convert to fraction form
   12,259.40/18,384.53 = 3,937.28/x
3. Step 3: Cross multiply
   12,259.40x = 18,384.53 × 3,937.28
4. Step 4: Simplify right side
   12,259.40x = 72,384,930.67
5. Step 5: Solve for x
   x = 72,384,930.67/12,259.40
6. Step 6: Final answer
   x = 5,904.45