Finding the Fourth Proportional to 31,729.45, 43,697.86 and 31,040.68

Step by Step Solution

1. Step 1: Write the proportion equation
   31,729.45 : 43,697.86 = 31,040.68 : x
2. Step 2: Convert to fraction form
   31,729.45/43,697.86 = 31,040.68/x
3. Step 3: Cross multiply
   31,729.45x = 43,697.86 × 31,040.68
4. Step 4: Simplify right side
   31,729.45x = 1,356,411,288.94
5. Step 5: Solve for x
   x = 1,356,411,288.94/31,729.45
6. Step 6: Final answer
   x = 42,749.28