Finding the Fourth Proportional to 3,419.30, 4,777.30 and 3,419.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,419.30 : 4,777.30 = 3,419.30 : x
2. Step 2: Convert to fraction form
   3,419.30/4,777.30 = 3,419.30/x
3. Step 3: Cross multiply
   3,419.30x = 4,777.30 × 3,419.30
4. Step 4: Simplify right side
   3,419.30x = 16,335,021.89
5. Step 5: Solve for x
   x = 16,335,021.89/3,419.30
6. Step 6: Final answer
   x = 4,777.30