Finding the Fourth Proportional to 31,458.42, 43,412.55 and 17,311.26

Step by Step Solution

1. Step 1: Write the proportion equation
   31,458.42 : 43,412.55 = 17,311.26 : x
2. Step 2: Convert to fraction form
   31,458.42/43,412.55 = 17,311.26/x
3. Step 3: Cross multiply
   31,458.42x = 43,412.55 × 17,311.26
4. Step 4: Simplify right side
   31,458.42x = 751,525,940.31
5. Step 5: Solve for x
   x = 751,525,940.31/31,458.42
6. Step 6: Final answer
   x = 23,889.50