Finding the Fourth Proportional to 6,109.20, 8,430.70 and 3,456.55

Step by Step Solution

1. Step 1: Write the proportion equation
   6,109.20 : 8,430.70 = 3,456.55 : x
2. Step 2: Convert to fraction form
   6,109.20/8,430.70 = 3,456.55/x
3. Step 3: Cross multiply
   6,109.20x = 8,430.70 × 3,456.55
4. Step 4: Simplify right side
   6,109.20x = 29,141,136.09
5. Step 5: Solve for x
   x = 29,141,136.09/6,109.20
6. Step 6: Final answer
   x = 4,770.04