Finding the Fourth Proportional to 31,155.21, 42,996.69 and 17,730.54

Step by Step Solution

1. Step 1: Write the proportion equation
   31,155.21 : 42,996.69 = 17,730.54 : x
2. Step 2: Convert to fraction form
   31,155.21/42,996.69 = 17,730.54/x
3. Step 3: Cross multiply
   31,155.21x = 42,996.69 × 17,730.54
4. Step 4: Simplify right side
   31,155.21x = 762,354,531.91
5. Step 5: Solve for x
   x = 762,354,531.91/31,155.21
6. Step 6: Final answer
   x = 24,469.57