Finding the Fourth Proportional to 9,155.99, 12,635.12 and 5,176.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,155.99 : 12,635.12 = 5,176.96 : x
2. Step 2: Convert to fraction form
   9,155.99/12,635.12 = 5,176.96/x
3. Step 3: Cross multiply
   9,155.99x = 12,635.12 × 5,176.96
4. Step 4: Simplify right side
   9,155.99x = 65,411,492.19
5. Step 5: Solve for x
   x = 65,411,492.19/9,155.99
6. Step 6: Final answer
   x = 7,144.12