Finding the Fourth Proportional to 6,109.43, 8,431.20 and 3,456.77

Step by Step Solution

1. Step 1: Write the proportion equation
   6,109.43 : 8,431.20 = 3,456.77 : x
2. Step 2: Convert to fraction form
   6,109.43/8,431.20 = 3,456.77/x
3. Step 3: Cross multiply
   6,109.43x = 8,431.20 × 3,456.77
4. Step 4: Simplify right side
   6,109.43x = 29,144,677.07
5. Step 5: Solve for x
   x = 29,144,677.07/6,109.43
6. Step 6: Final answer
   x = 4,770.45