Finding the Fourth Proportional to 9,170.85, 12,654.69 and 5,137.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,170.85 : 12,654.69 = 5,137.89 : x
2. Step 2: Convert to fraction form
   9,170.85/12,654.69 = 5,137.89/x
3. Step 3: Cross multiply
   9,170.85x = 12,654.69 × 5,137.89
4. Step 4: Simplify right side
   9,170.85x = 65,018,405.20
5. Step 5: Solve for x
   x = 65,018,405.20/9,170.85
6. Step 6: Final answer
   x = 7,089.68