Finding the Fourth Proportional to 6,469.47, 8,942.00 and 5,439.15

Step by Step Solution

1. Step 1: Write the proportion equation
   6,469.47 : 8,942.00 = 5,439.15 : x
2. Step 2: Convert to fraction form
   6,469.47/8,942.00 = 5,439.15/x
3. Step 3: Cross multiply
   6,469.47x = 8,942.00 × 5,439.15
4. Step 4: Simplify right side
   6,469.47x = 48,636,852.10
5. Step 5: Solve for x
   x = 48,636,852.10/6,469.47
6. Step 6: Final answer
   x = 7,517.90