Finding the Fourth Proportional to 12,418.45, 17,136.17 and 7,113.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,418.45 : 17,136.17 = 7,113.49 : x
2. Step 2: Convert to fraction form
   12,418.45/17,136.17 = 7,113.49/x
3. Step 3: Cross multiply
   12,418.45x = 17,136.17 × 7,113.49
4. Step 4: Simplify right side
   12,418.45x = 121,897,938.37
5. Step 5: Solve for x
   x = 121,897,938.37/12,418.45
6. Step 6: Final answer
   x = 9,815.87