Finding the Fourth Proportional to 12,658.69, 18,989.55 and 5,268.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,658.69 : 18,989.55 = 5,268.15 : x
2. Step 2: Convert to fraction form
   12,658.69/18,989.55 = 5,268.15/x
3. Step 3: Cross multiply
   12,658.69x = 18,989.55 × 5,268.15
4. Step 4: Simplify right side
   12,658.69x = 100,039,702.88
5. Step 5: Solve for x
   x = 100,039,702.88/12,658.69
6. Step 6: Final answer
   x = 7,902.85