Finding the Fourth Proportional to 31,076.64, 42,885.74 and 16,929.48

Step by Step Solution

1. Step 1: Write the proportion equation
   31,076.64 : 42,885.74 = 16,929.48 : x
2. Step 2: Convert to fraction form
   31,076.64/42,885.74 = 16,929.48/x
3. Step 3: Cross multiply
   31,076.64x = 42,885.74 × 16,929.48
4. Step 4: Simplify right side
   31,076.64x = 726,033,277.62
5. Step 5: Solve for x
   x = 726,033,277.62/31,076.64
6. Step 6: Final answer
   x = 23,362.67