Finding the Fourth Proportional to 31,311, 43,209.18 and 17,164.38

Step by Step Solution

1. Step 1: Write the proportion equation
   31,311 : 43,209.18 = 17,164.38 : x
2. Step 2: Convert to fraction form
   31,311/43,209.18 = 17,164.38/x
3. Step 3: Cross multiply
   31,311x = 43,209.18 × 17,164.38
4. Step 4: Simplify right side
   31,311x = 741,658,785.01
5. Step 5: Solve for x
   x = 741,658,785.01/31,311
6. Step 6: Final answer
   x = 23,686.84