Finding the Fourth Proportional to 6,910.21, 10,367.88 and 4,138.83

Step by Step Solution

1. Step 1: Write the proportion equation
   6,910.21 : 10,367.88 = 4,138.83 : x
2. Step 2: Convert to fraction form
   6,910.21/10,367.88 = 4,138.83/x
3. Step 3: Cross multiply
   6,910.21x = 10,367.88 × 4,138.83
4. Step 4: Simplify right side
   6,910.21x = 42,910,892.78
5. Step 5: Solve for x
   x = 42,910,892.78/6,910.21
6. Step 6: Final answer
   x = 6,209.78