Finding the Fourth Proportional to 6,109.59, 8,428.86 and 4,319.70

Step by Step Solution

1. Step 1: Write the proportion equation
   6,109.59 : 8,428.86 = 4,319.70 : x
2. Step 2: Convert to fraction form
   6,109.59/8,428.86 = 4,319.70/x
3. Step 3: Cross multiply
   6,109.59x = 8,428.86 × 4,319.70
4. Step 4: Simplify right side
   6,109.59x = 36,410,146.54
5. Step 5: Solve for x
   x = 36,410,146.54/6,109.59
6. Step 6: Final answer
   x = 5,959.51