Finding the Fourth Proportional to 5,359.59, 7,388.61 and 3,940.77

Step by Step Solution

1. Step 1: Write the proportion equation
   5,359.59 : 7,388.61 = 3,940.77 : x
2. Step 2: Convert to fraction form
   5,359.59/7,388.61 = 3,940.77/x
3. Step 3: Cross multiply
   5,359.59x = 7,388.61 × 3,940.77
4. Step 4: Simplify right side
   5,359.59x = 29,116,775.69
5. Step 5: Solve for x
   x = 29,116,775.69/5,359.59
6. Step 6: Final answer
   x = 5,432.65