Finding the Fourth Proportional to 9,156.96, 12,636.61 and 4,965.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,156.96 : 12,636.61 = 4,965.21 : x
2. Step 2: Convert to fraction form
   9,156.96/12,636.61 = 4,965.21/x
3. Step 3: Cross multiply
   9,156.96x = 12,636.61 × 4,965.21
4. Step 4: Simplify right side
   9,156.96x = 62,743,334.33
5. Step 5: Solve for x
   x = 62,743,334.33/9,156.96
6. Step 6: Final answer
   x = 6,851.99