Finding the Fourth Proportional to 51,781.74, 71,429.67 and 31,079.94

Step by Step Solution

1. Step 1: Write the proportion equation
   51,781.74 : 71,429.67 = 31,079.94 : x
2. Step 2: Convert to fraction form
   51,781.74/71,429.67 = 31,079.94/x
3. Step 3: Cross multiply
   51,781.74x = 71,429.67 × 31,079.94
4. Step 4: Simplify right side
   51,781.74x = 2,220,029,857.82
5. Step 5: Solve for x
   x = 2,220,029,857.82/51,781.74
6. Step 6: Final answer
   x = 42,872.83