Finding the Fourth Proportional to 31,076.84, 42,886.20 and 16,929.68

Step by Step Solution

1. Step 1: Write the proportion equation
   31,076.84 : 42,886.20 = 16,929.68 : x
2. Step 2: Convert to fraction form
   31,076.84/42,886.20 = 16,929.68/x
3. Step 3: Cross multiply
   31,076.84x = 42,886.20 × 16,929.68
4. Step 4: Simplify right side
   31,076.84x = 726,049,642.42
5. Step 5: Solve for x
   x = 726,049,642.42/31,076.84
6. Step 6: Final answer
   x = 23,363.05