Finding the Fourth Proportional to 9,155.81, 12,635.29 and 5,176.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,155.81 : 12,635.29 = 5,176.84 : x
2. Step 2: Convert to fraction form
   9,155.81/12,635.29 = 5,176.84/x
3. Step 3: Cross multiply
   9,155.81x = 12,635.29 × 5,176.84
4. Step 4: Simplify right side
   9,155.81x = 65,410,830.15
5. Step 5: Solve for x
   x = 65,410,830.15/9,155.81
6. Step 6: Final answer
   x = 7,144.19