Finding the Fourth Proportional to 9,171.99, 12,657.69 and 5,636.34

Step by Step Solution

1. Step 1: Write the proportion equation
   9,171.99 : 12,657.69 = 5,636.34 : x
2. Step 2: Convert to fraction form
   9,171.99/12,657.69 = 5,636.34/x
3. Step 3: Cross multiply
   9,171.99x = 12,657.69 × 5,636.34
4. Step 4: Simplify right side
   9,171.99x = 71,343,044.45
5. Step 5: Solve for x
   x = 71,343,044.45/9,171.99
6. Step 6: Final answer
   x = 7,778.36