Finding the Fourth Proportional to 5,099.50, 7,035.18 and 3,109.30

Step by Step Solution

1. Step 1: Write the proportion equation
   5,099.50 : 7,035.18 = 3,109.30 : x
2. Step 2: Convert to fraction form
   5,099.50/7,035.18 = 3,109.30/x
3. Step 3: Cross multiply
   5,099.50x = 7,035.18 × 3,109.30
4. Step 4: Simplify right side
   5,099.50x = 21,874,485.17
5. Step 5: Solve for x
   x = 21,874,485.17/5,099.50
6. Step 6: Final answer
   x = 4,289.54