Finding the Fourth Proportional to 12,180.05, 16,802.28 and 7,398.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,180.05 : 16,802.28 = 7,398.72 : x
2. Step 2: Convert to fraction form
   12,180.05/16,802.28 = 7,398.72/x
3. Step 3: Cross multiply
   12,180.05x = 16,802.28 × 7,398.72
4. Step 4: Simplify right side
   12,180.05x = 124,315,365.08
5. Step 5: Solve for x
   x = 124,315,365.08/12,180.05
6. Step 6: Final answer
   x = 10,206.47