Finding the Fourth Proportional to 31,317.30, 43,218.24 and 17,890.35

Step by Step Solution

1. Step 1: Write the proportion equation
   31,317.30 : 43,218.24 = 17,890.35 : x
2. Step 2: Convert to fraction form
   31,317.30/43,218.24 = 17,890.35/x
3. Step 3: Cross multiply
   31,317.30x = 43,218.24 × 17,890.35
4. Step 4: Simplify right side
   31,317.30x = 773,189,439.98
5. Step 5: Solve for x
   x = 773,189,439.98/31,317.30
6. Step 6: Final answer
   x = 24,688.89