Finding the Fourth Proportional to 51,978.34, 71,731.29 and 30,761.38

Step by Step Solution

1. Step 1: Write the proportion equation
   51,978.34 : 71,731.29 = 30,761.38 : x
2. Step 2: Convert to fraction form
   51,978.34/71,731.29 = 30,761.38/x
3. Step 3: Cross multiply
   51,978.34x = 71,731.29 × 30,761.38
4. Step 4: Simplify right side
   51,978.34x = 2,206,553,469.58
5. Step 5: Solve for x
   x = 2,206,553,469.58/51,978.34
6. Step 6: Final answer
   x = 42,451.40