Finding the Fourth Proportional to 3,990.47, 5,507.33 and 2,398.01

Step by Step Solution

1. Step 1: Write the proportion equation
   3,990.47 : 5,507.33 = 2,398.01 : x
2. Step 2: Convert to fraction form
   3,990.47/5,507.33 = 2,398.01/x
3. Step 3: Cross multiply
   3,990.47x = 5,507.33 × 2,398.01
4. Step 4: Simplify right side
   3,990.47x = 13,206,592.89
5. Step 5: Solve for x
   x = 13,206,592.89/3,990.47
6. Step 6: Final answer
   x = 3,309.54