Finding the Fourth Proportional to 12,336.63, 18,506.75 and 3,900.29

Step by Step Solution

1. Step 1: Write the proportion equation
   12,336.63 : 18,506.75 = 3,900.29 : x
2. Step 2: Convert to fraction form
   12,336.63/18,506.75 = 3,900.29/x
3. Step 3: Cross multiply
   12,336.63x = 18,506.75 × 3,900.29
4. Step 4: Simplify right side
   12,336.63x = 72,181,579.92
5. Step 5: Solve for x
   x = 72,181,579.92/12,336.63
6. Step 6: Final answer
   x = 5,851.00