Finding the Fourth Proportional to 3,940.72, 5,903.70 and 3,535

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940.72 : 5,903.70 = 3,535 : x
2. Step 2: Convert to fraction form
   3,940.72/5,903.70 = 3,535/x
3. Step 3: Cross multiply
   3,940.72x = 5,903.70 × 3,535
4. Step 4: Simplify right side
   3,940.72x = 20,869,579.50
5. Step 5: Solve for x
   x = 20,869,579.50/3,940.72
6. Step 6: Final answer
   x = 5,295.88