Finding the Fourth Proportional to 8,983.94, 12,396.76 and 5,155.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,983.94 : 12,396.76 = 5,155.38 : x
2. Step 2: Convert to fraction form
   8,983.94/12,396.76 = 5,155.38/x
3. Step 3: Cross multiply
   8,983.94x = 12,396.76 × 5,155.38
4. Step 4: Simplify right side
   8,983.94x = 63,909,976.78
5. Step 5: Solve for x
   x = 63,909,976.78/8,983.94
6. Step 6: Final answer
   x = 7,113.80