Finding the Fourth Proportional to 31,463.88, 43,419.59 and 17,123.21

Step by Step Solution

1. Step 1: Write the proportion equation
   31,463.88 : 43,419.59 = 17,123.21 : x
2. Step 2: Convert to fraction form
   31,463.88/43,419.59 = 17,123.21/x
3. Step 3: Cross multiply
   31,463.88x = 43,419.59 × 17,123.21
4. Step 4: Simplify right side
   31,463.88x = 743,483,022.56
5. Step 5: Solve for x
   x = 743,483,022.56/31,463.88
6. Step 6: Final answer
   x = 23,629.73