Finding the Fourth Proportional to 13,402.49, 18,496.28 and 7,738.28

Step by Step Solution

1. Step 1: Write the proportion equation
   13,402.49 : 18,496.28 = 7,738.28 : x
2. Step 2: Convert to fraction form
   13,402.49/18,496.28 = 7,738.28/x
3. Step 3: Cross multiply
   13,402.49x = 18,496.28 × 7,738.28
4. Step 4: Simplify right side
   13,402.49x = 143,129,401.15
5. Step 5: Solve for x
   x = 143,129,401.15/13,402.49
6. Step 6: Final answer
   x = 10,679.31