Finding the Fourth Proportional to 268,915.37, 403,375.37 and 76,789.30

Step by Step Solution

1. Step 1: Write the proportion equation
   268,915.37 : 403,375.37 = 76,789.30 : x
2. Step 2: Convert to fraction form
   268,915.37/403,375.37 = 76,789.30/x
3. Step 3: Cross multiply
   268,915.37x = 403,375.37 × 76,789.30
4. Step 4: Simplify right side
   268,915.37x = 30,974,912,299.54
5. Step 5: Solve for x
   x = 30,974,912,299.54/268,915.37
6. Step 6: Final answer
   x = 115,184.61