Finding the Fourth Proportional to 31,485.24, 43,450.20 and 17,145.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,485.24 : 43,450.20 = 17,145.50 : x
2. Step 2: Convert to fraction form
   31,485.24/43,450.20 = 17,145.50/x
3. Step 3: Cross multiply
   31,485.24x = 43,450.20 × 17,145.50
4. Step 4: Simplify right side
   31,485.24x = 744,975,186.85
5. Step 5: Solve for x
   x = 744,975,186.85/31,485.24
6. Step 6: Final answer
   x = 23,661.09