Finding the Fourth Proportional to 31,878.63, 43,993.08 and 17,731.47

Step by Step Solution

1. Step 1: Write the proportion equation
   31,878.63 : 43,993.08 = 17,731.47 : x
2. Step 2: Convert to fraction form
   31,878.63/43,993.08 = 17,731.47/x
3. Step 3: Cross multiply
   31,878.63x = 43,993.08 × 17,731.47
4. Step 4: Simplify right side
   31,878.63x = 780,061,978.23
5. Step 5: Solve for x
   x = 780,061,978.23/31,878.63
6. Step 6: Final answer
   x = 24,469.75