Finding the Fourth Proportional to 12,206.16, 18,300.72 and 5,623.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,206.16 : 18,300.72 = 5,623.28 : x
2. Step 2: Convert to fraction form
   12,206.16/18,300.72 = 5,623.28/x
3. Step 3: Cross multiply
   12,206.16x = 18,300.72 × 5,623.28
4. Step 4: Simplify right side
   12,206.16x = 102,910,072.76
5. Step 5: Solve for x
   x = 102,910,072.76/12,206.16
6. Step 6: Final answer
   x = 8,430.99