Finding the Fourth Proportional to 31,321.88, 43,224.78 and 17,174.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,321.88 : 43,224.78 = 17,174.72 : x
2. Step 2: Convert to fraction form
   31,321.88/43,224.78 = 17,174.72/x
3. Step 3: Cross multiply
   31,321.88x = 43,224.78 × 17,174.72
4. Step 4: Simplify right side
   31,321.88x = 742,373,277.44
5. Step 5: Solve for x
   x = 742,373,277.44/31,321.88
6. Step 6: Final answer
   x = 23,701.43