Finding the Fourth Proportional to 31,458.38, 43,412.71 and 17,118.34

Step by Step Solution

1. Step 1: Write the proportion equation
   31,458.38 : 43,412.71 = 17,118.34 : x
2. Step 2: Convert to fraction form
   31,458.38/43,412.71 = 17,118.34/x
3. Step 3: Cross multiply
   31,458.38x = 43,412.71 × 17,118.34
4. Step 4: Simplify right side
   31,458.38x = 743,153,410.87
5. Step 5: Solve for x
   x = 743,153,410.87/31,458.38
6. Step 6: Final answer
   x = 23,623.39