Finding the Fourth Proportional to 12,199.82, 18,300.94 and 3,315.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,199.82 : 18,300.94 = 3,315.30 : x
2. Step 2: Convert to fraction form
   12,199.82/18,300.94 = 3,315.30/x
3. Step 3: Cross multiply
   12,199.82x = 18,300.94 × 3,315.30
4. Step 4: Simplify right side
   12,199.82x = 60,673,029.47
5. Step 5: Solve for x
   x = 60,673,029.47/12,199.82
6. Step 6: Final answer
   x = 4,973.27