Finding the Fourth Proportional to 3,019.30, 4,234.70 and 3,019.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,019.30 : 4,234.70 = 3,019.30 : x
2. Step 2: Convert to fraction form
   3,019.30/4,234.70 = 3,019.30/x
3. Step 3: Cross multiply
   3,019.30x = 4,234.70 × 3,019.30
4. Step 4: Simplify right side
   3,019.30x = 12,785,829.71
5. Step 5: Solve for x
   x = 12,785,829.71/3,019.30
6. Step 6: Final answer
   x = 4,234.70