Finding the Fourth Proportional to 31,528.91, 43,511.51 and 17,381.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,528.91 : 43,511.51 = 17,381.72 : x
2. Step 2: Convert to fraction form
   31,528.91/43,511.51 = 17,381.72/x
3. Step 3: Cross multiply
   31,528.91x = 43,511.51 × 17,381.72
4. Step 4: Simplify right side
   31,528.91x = 756,304,796.69
5. Step 5: Solve for x
   x = 756,304,796.69/31,528.91
6. Step 6: Final answer
   x = 23,987.66