Finding the Fourth Proportional to 5,200.18, 7,800.28 and 3,456.34

Step by Step Solution

1. Step 1: Write the proportion equation
   5,200.18 : 7,800.28 = 3,456.34 : x
2. Step 2: Convert to fraction form
   5,200.18/7,800.28 = 3,456.34/x
3. Step 3: Cross multiply
   5,200.18x = 7,800.28 × 3,456.34
4. Step 4: Simplify right side
   5,200.18x = 26,960,419.78
5. Step 5: Solve for x
   x = 26,960,419.78/5,200.18
6. Step 6: Final answer
   x = 5,184.52