Finding the Fourth Proportional to 31,185.36, 43,038.72 and 17,040.30

Step by Step Solution

1. Step 1: Write the proportion equation
   31,185.36 : 43,038.72 = 17,040.30 : x
2. Step 2: Convert to fraction form
   31,185.36/43,038.72 = 17,040.30/x
3. Step 3: Cross multiply
   31,185.36x = 43,038.72 × 17,040.30
4. Step 4: Simplify right side
   31,185.36x = 733,392,700.42
5. Step 5: Solve for x
   x = 733,392,700.42/31,185.36
6. Step 6: Final answer
   x = 23,517.21