Finding the Fourth Proportional to 12,155.69, 18,221.38 and 10,483.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,155.69 : 18,221.38 = 10,483.04 : x
2. Step 2: Convert to fraction form
   12,155.69/18,221.38 = 10,483.04/x
3. Step 3: Cross multiply
   12,155.69x = 18,221.38 × 10,483.04
4. Step 4: Simplify right side
   12,155.69x = 191,015,455.40
5. Step 5: Solve for x
   x = 191,015,455.40/12,155.69
6. Step 6: Final answer
   x = 15,714.08