Finding the Fourth Proportional to 31,311.36, 43,209.18 and 17,164.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,311.36 : 43,209.18 = 17,164.31 : x
2. Step 2: Convert to fraction form
   31,311.36/43,209.18 = 17,164.31/x
3. Step 3: Cross multiply
   31,311.36x = 43,209.18 × 17,164.31
4. Step 4: Simplify right side
   31,311.36x = 741,655,544.32
5. Step 5: Solve for x
   x = 741,655,544.32/31,311.36
6. Step 6: Final answer
   x = 23,686.47