Finding the Fourth Proportional to 12,639.50, 17,442.52 and 7,050.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,639.50 : 17,442.52 = 7,050.50 : x
2. Step 2: Convert to fraction form
   12,639.50/17,442.52 = 7,050.50/x
3. Step 3: Cross multiply
   12,639.50x = 17,442.52 × 7,050.50
4. Step 4: Simplify right side
   12,639.50x = 122,978,487.26
5. Step 5: Solve for x
   x = 122,978,487.26/12,639.50
6. Step 6: Final answer
   x = 9,729.70