Finding the Fourth Proportional to 31,109.43, 42,930.80 and 16,962.87

Step by Step Solution

1. Step 1: Write the proportion equation
   31,109.43 : 42,930.80 = 16,962.87 : x
2. Step 2: Convert to fraction form
   31,109.43/42,930.80 = 16,962.87/x
3. Step 3: Cross multiply
   31,109.43x = 42,930.80 × 16,962.87
4. Step 4: Simplify right side
   31,109.43x = 728,229,494.58
5. Step 5: Solve for x
   x = 728,229,494.58/31,109.43
6. Step 6: Final answer
   x = 23,408.64