Finding the Fourth Proportional to 31,092.46, 42,906.34 and 16,945

Step by Step Solution

1. Step 1: Write the proportion equation
   31,092.46 : 42,906.34 = 16,945 : x
2. Step 2: Convert to fraction form
   31,092.46/42,906.34 = 16,945/x
3. Step 3: Cross multiply
   31,092.46x = 42,906.34 × 16,945
4. Step 4: Simplify right side
   31,092.46x = 727,047,931.30
5. Step 5: Solve for x
   x = 727,047,931.30/31,092.46
6. Step 6: Final answer
   x = 23,383.42