Finding the Fourth Proportional to 71,108.70, 106,682.83 and 31,120.56

Step by Step Solution

1. Step 1: Write the proportion equation
   71,108.70 : 106,682.83 = 31,120.56 : x
2. Step 2: Convert to fraction form
   71,108.70/106,682.83 = 31,120.56/x
3. Step 3: Cross multiply
   71,108.70x = 106,682.83 × 31,120.56
4. Step 4: Simplify right side
   71,108.70x = 3,320,029,411.98
5. Step 5: Solve for x
   x = 3,320,029,411.98/71,108.70
6. Step 6: Final answer
   x = 46,689.50