Finding the Fourth Proportional to 6,899.72, 10,348.56 and 2,219.10

Step by Step Solution

1. Step 1: Write the proportion equation
   6,899.72 : 10,348.56 = 2,219.10 : x
2. Step 2: Convert to fraction form
   6,899.72/10,348.56 = 2,219.10/x
3. Step 3: Cross multiply
   6,899.72x = 10,348.56 × 2,219.10
4. Step 4: Simplify right side
   6,899.72x = 22,964,489.50
5. Step 5: Solve for x
   x = 22,964,489.50/6,899.72
6. Step 6: Final answer
   x = 3,328.32