Finding the Fourth Proportional to 31,109.00, 42,930.45 and 16,961.85

Step by Step Solution

1. Step 1: Write the proportion equation
   31,109.00 : 42,930.45 = 16,961.85 : x
2. Step 2: Convert to fraction form
   31,109.00/42,930.45 = 16,961.85/x
3. Step 3: Cross multiply
   31,109.00x = 42,930.45 × 16,961.85
4. Step 4: Simplify right side
   31,109.00x = 728,179,853.33
5. Step 5: Solve for x
   x = 728,179,853.33/31,109.00
6. Step 6: Final answer
   x = 23,407.37