Finding the Fourth Proportional to 31,109.20, 42,930.91 and 16,962.04

Step by Step Solution

1. Step 1: Write the proportion equation
   31,109.20 : 42,930.91 = 16,962.04 : x
2. Step 2: Convert to fraction form
   31,109.20/42,930.91 = 16,962.04/x
3. Step 3: Cross multiply
   31,109.20x = 42,930.91 × 16,962.04
4. Step 4: Simplify right side
   31,109.20x = 728,195,887.52
5. Step 5: Solve for x
   x = 728,195,887.52/31,109.20
6. Step 6: Final answer
   x = 23,407.74