Finding the Fourth Proportional to 6,899.48, 9,519.72 and 3,914.60

Step by Step Solution

1. Step 1: Write the proportion equation
   6,899.48 : 9,519.72 = 3,914.60 : x
2. Step 2: Convert to fraction form
   6,899.48/9,519.72 = 3,914.60/x
3. Step 3: Cross multiply
   6,899.48x = 9,519.72 × 3,914.60
4. Step 4: Simplify right side
   6,899.48x = 37,265,895.91
5. Step 5: Solve for x
   x = 37,265,895.91/6,899.48
6. Step 6: Final answer
   x = 5,401.26