Finding the Fourth Proportional to 8,200.17, 12,297.42 and 2,355.21

Step by Step Solution

1. Step 1: Write the proportion equation
   8,200.17 : 12,297.42 = 2,355.21 : x
2. Step 2: Convert to fraction form
   8,200.17/12,297.42 = 2,355.21/x
3. Step 3: Cross multiply
   8,200.17x = 12,297.42 × 2,355.21
4. Step 4: Simplify right side
   8,200.17x = 28,963,006.56
5. Step 5: Solve for x
   x = 28,963,006.56/8,200.17
6. Step 6: Final answer
   x = 3,532.00