Finding the Fourth Proportional to 12,642.48, 17,450.28 and 7,338.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,642.48 : 17,450.28 = 7,338.48 : x
2. Step 2: Convert to fraction form
   12,642.48/17,450.28 = 7,338.48/x
3. Step 3: Cross multiply
   12,642.48x = 17,450.28 × 7,338.48
4. Step 4: Simplify right side
   12,642.48x = 128,058,530.77
5. Step 5: Solve for x
   x = 128,058,530.77/12,642.48
6. Step 6: Final answer
   x = 10,129.23