Finding the Fourth Proportional to 7,419.50, 10,239.63 and 4,107.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,419.50 : 10,239.63 = 4,107.50 : x
2. Step 2: Convert to fraction form
   7,419.50/10,239.63 = 4,107.50/x
3. Step 3: Cross multiply
   7,419.50x = 10,239.63 × 4,107.50
4. Step 4: Simplify right side
   7,419.50x = 42,059,280.23
5. Step 5: Solve for x
   x = 42,059,280.23/7,419.50
6. Step 6: Final answer
   x = 5,668.75