Finding the Fourth Proportional to 6,109.88, 8,430.72 and 3,591.80

Step by Step Solution

1. Step 1: Write the proportion equation
   6,109.88 : 8,430.72 = 3,591.80 : x
2. Step 2: Convert to fraction form
   6,109.88/8,430.72 = 3,591.80/x
3. Step 3: Cross multiply
   6,109.88x = 8,430.72 × 3,591.80
4. Step 4: Simplify right side
   6,109.88x = 30,281,460.10
5. Step 5: Solve for x
   x = 30,281,460.10/6,109.88
6. Step 6: Final answer
   x = 4,956.15