Finding the Fourth Proportional to 31,076.72, 42,884.56 and 16,929.68

Step by Step Solution

1. Step 1: Write the proportion equation
   31,076.72 : 42,884.56 = 16,929.68 : x
2. Step 2: Convert to fraction form
   31,076.72/42,884.56 = 16,929.68/x
3. Step 3: Cross multiply
   31,076.72x = 42,884.56 × 16,929.68
4. Step 4: Simplify right side
   31,076.72x = 726,021,877.74
5. Step 5: Solve for x
   x = 726,021,877.74/31,076.72
6. Step 6: Final answer
   x = 23,362.24