Finding the Fourth Proportional to 76,915.42, 115,414.17 and 30,168.70

Step by Step Solution

1. Step 1: Write the proportion equation
   76,915.42 : 115,414.17 = 30,168.70 : x
2. Step 2: Convert to fraction form
   76,915.42/115,414.17 = 30,168.70/x
3. Step 3: Cross multiply
   76,915.42x = 115,414.17 × 30,168.70
4. Step 4: Simplify right side
   76,915.42x = 3,481,895,470.48
5. Step 5: Solve for x
   x = 3,481,895,470.48/76,915.42
6. Step 6: Final answer
   x = 45,269.15