Finding the Fourth Proportional to 50,836.38, 70,137.40 and 30,685.61

Step by Step Solution

1. Step 1: Write the proportion equation
   50,836.38 : 70,137.40 = 30,685.61 : x
2. Step 2: Convert to fraction form
   50,836.38/70,137.40 = 30,685.61/x
3. Step 3: Cross multiply
   50,836.38x = 70,137.40 × 30,685.61
4. Step 4: Simplify right side
   50,836.38x = 2,152,208,398.70
5. Step 5: Solve for x
   x = 2,152,208,398.70/50,836.38
6. Step 6: Final answer
   x = 42,335.99