Finding the Fourth Proportional to 12,283.86, 18,426.42 and 3,520.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,283.86 : 18,426.42 = 3,520.08 : x
2. Step 2: Convert to fraction form
   12,283.86/18,426.42 = 3,520.08/x
3. Step 3: Cross multiply
   12,283.86x = 18,426.42 × 3,520.08
4. Step 4: Simplify right side
   12,283.86x = 64,862,472.51
5. Step 5: Solve for x
   x = 64,862,472.51/12,283.86
6. Step 6: Final answer
   x = 5,280.30