Finding the Fourth Proportional to 31,419.78, 43,359.30 and 17,995.49

Step by Step Solution

1. Step 1: Write the proportion equation
   31,419.78 : 43,359.30 = 17,995.49 : x
2. Step 2: Convert to fraction form
   31,419.78/43,359.30 = 17,995.49/x
3. Step 3: Cross multiply
   31,419.78x = 43,359.30 × 17,995.49
4. Step 4: Simplify right side
   31,419.78x = 780,271,849.56
5. Step 5: Solve for x
   x = 780,271,849.56/31,419.78
6. Step 6: Final answer
   x = 24,833.78