Finding the Fourth Proportional to 31,030.80, 42,821.84 and 16,884

Step by Step Solution

1. Step 1: Write the proportion equation
   31,030.80 : 42,821.84 = 16,884 : x
2. Step 2: Convert to fraction form
   31,030.80/42,821.84 = 16,884/x
3. Step 3: Cross multiply
   31,030.80x = 42,821.84 × 16,884
4. Step 4: Simplify right side
   31,030.80x = 723,003,946.56
5. Step 5: Solve for x
   x = 723,003,946.56/31,030.80
6. Step 6: Final answer
   x = 23,299.56