Finding the Fourth Proportional to 8,912.52, 12,299.56 and 5,135.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,912.52 : 12,299.56 = 5,135.38 : x
2. Step 2: Convert to fraction form
   8,912.52/12,299.56 = 5,135.38/x
3. Step 3: Cross multiply
   8,912.52x = 12,299.56 × 5,135.38
4. Step 4: Simplify right side
   8,912.52x = 63,162,914.43
5. Step 5: Solve for x
   x = 63,162,914.43/8,912.52
6. Step 6: Final answer
   x = 7,086.99