Finding the Fourth Proportional to 31,485.50, 43,449.99 and 17,338.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,485.50 : 43,449.99 = 17,338.31 : x
2. Step 2: Convert to fraction form
   31,485.50/43,449.99 = 17,338.31/x
3. Step 3: Cross multiply
   31,485.50x = 43,449.99 × 17,338.31
4. Step 4: Simplify right side
   31,485.50x = 753,349,396.12
5. Step 5: Solve for x
   x = 753,349,396.12/31,485.50
6. Step 6: Final answer
   x = 23,926.87