Finding the Fourth Proportional to 6,111.85, 8,434.31 and 3,459.21

Step by Step Solution

1. Step 1: Write the proportion equation
   6,111.85 : 8,434.31 = 3,459.21 : x
2. Step 2: Convert to fraction form
   6,111.85/8,434.31 = 3,459.21/x
3. Step 3: Cross multiply
   6,111.85x = 8,434.31 × 3,459.21
4. Step 4: Simplify right side
   6,111.85x = 29,176,049.50
5. Step 5: Solve for x
   x = 29,176,049.50/6,111.85
6. Step 6: Final answer
   x = 4,773.69