Finding the Fourth Proportional to 3,623.31, 5,399.32 and 3,505.71

Step by Step Solution

1. Step 1: Write the proportion equation
   3,623.31 : 5,399.32 = 3,505.71 : x
2. Step 2: Convert to fraction form
   3,623.31/5,399.32 = 3,505.71/x
3. Step 3: Cross multiply
   3,623.31x = 5,399.32 × 3,505.71
4. Step 4: Simplify right side
   3,623.31x = 18,928,441.35
5. Step 5: Solve for x
   x = 18,928,441.35/3,623.31
6. Step 6: Final answer
   x = 5,224.07