Finding the Fourth Proportional to 12,638.72, 17,442.24 and 7,050.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,638.72 : 17,442.24 = 7,050.56 : x
2. Step 2: Convert to fraction form
   12,638.72/17,442.24 = 7,050.56/x
3. Step 3: Cross multiply
   12,638.72x = 17,442.24 × 7,050.56
4. Step 4: Simplify right side
   12,638.72x = 122,977,559.65
5. Step 5: Solve for x
   x = 122,977,559.65/12,638.72
6. Step 6: Final answer
   x = 9,730.22