Finding the Fourth Proportional to 3,419.31, 5,130.95 and 3,391.47

Step by Step Solution

1. Step 1: Write the proportion equation
   3,419.31 : 5,130.95 = 3,391.47 : x
2. Step 2: Convert to fraction form
   3,419.31/5,130.95 = 3,391.47/x
3. Step 3: Cross multiply
   3,419.31x = 5,130.95 × 3,391.47
4. Step 4: Simplify right side
   3,419.31x = 17,401,446.04
5. Step 5: Solve for x
   x = 17,401,446.04/3,419.31
6. Step 6: Final answer
   x = 5,089.16