Finding the Fourth Proportional to 9,137.45, 12,609.59 and 5,158.47

Step by Step Solution

1. Step 1: Write the proportion equation
   9,137.45 : 12,609.59 = 5,158.47 : x
2. Step 2: Convert to fraction form
   9,137.45/12,609.59 = 5,158.47/x
3. Step 3: Cross multiply
   9,137.45x = 12,609.59 × 5,158.47
4. Step 4: Simplify right side
   9,137.45x = 65,046,191.73
5. Step 5: Solve for x
   x = 65,046,191.73/9,137.45
6. Step 6: Final answer
   x = 7,118.64