Finding the Fourth Proportional to 106,262.70, 159,411.31 and 31,390.38

Step by Step Solution

1. Step 1: Write the proportion equation
   106,262.70 : 159,411.31 = 31,390.38 : x
2. Step 2: Convert to fraction form
   106,262.70/159,411.31 = 31,390.38/x
3. Step 3: Cross multiply
   106,262.70x = 159,411.31 × 31,390.38
4. Step 4: Simplify right side
   106,262.70x = 5,003,981,518.72
5. Step 5: Solve for x
   x = 5,003,981,518.72/106,262.70
6. Step 6: Final answer
   x = 47,090.67