Finding the Fourth Proportional to 6,419.45, 8,854.10 and 4,059.31

Step by Step Solution

1. Step 1: Write the proportion equation
   6,419.45 : 8,854.10 = 4,059.31 : x
2. Step 2: Convert to fraction form
   6,419.45/8,854.10 = 4,059.31/x
3. Step 3: Cross multiply
   6,419.45x = 8,854.10 × 4,059.31
4. Step 4: Simplify right side
   6,419.45x = 35,941,536.67
5. Step 5: Solve for x
   x = 35,941,536.67/6,419.45
6. Step 6: Final answer
   x = 5,598.85