Finding the Fourth Proportional to 51,091.43, 70,508.21 and 30,936.94

Step by Step Solution

1. Step 1: Write the proportion equation
   51,091.43 : 70,508.21 = 30,936.94 : x
2. Step 2: Convert to fraction form
   51,091.43/70,508.21 = 30,936.94/x
3. Step 3: Cross multiply
   51,091.43x = 70,508.21 × 30,936.94
4. Step 4: Simplify right side
   51,091.43x = 2,181,307,931.32
5. Step 5: Solve for x
   x = 2,181,307,931.32/51,091.43
6. Step 6: Final answer
   x = 42,694.21