Finding the Fourth Proportional to 31,251.21, 43,126.79 and 17,105.37

Step by Step Solution

1. Step 1: Write the proportion equation
   31,251.21 : 43,126.79 = 17,105.37 : x
2. Step 2: Convert to fraction form
   31,251.21/43,126.79 = 17,105.37/x
3. Step 3: Cross multiply
   31,251.21x = 43,126.79 × 17,105.37
4. Step 4: Simplify right side
   31,251.21x = 737,699,699.86
5. Step 5: Solve for x
   x = 737,699,699.86/31,251.21
6. Step 6: Final answer
   x = 23,605.48