Finding the Fourth Proportional to 9,155.98, 12,635.11 and 5,176.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,155.98 : 12,635.11 = 5,176.96 : x
2. Step 2: Convert to fraction form
   9,155.98/12,635.11 = 5,176.96/x
3. Step 3: Cross multiply
   9,155.98x = 12,635.11 × 5,176.96
4. Step 4: Simplify right side
   9,155.98x = 65,411,459.07
5. Step 5: Solve for x
   x = 65,411,459.07/9,155.98
6. Step 6: Final answer
   x = 7,144.12