Finding the Fourth Proportional to 11,281.80, 16,920.72 and 4,262.43

Step by Step Solution

1. Step 1: Write the proportion equation
   11,281.80 : 16,920.72 = 4,262.43 : x
2. Step 2: Convert to fraction form
   11,281.80/16,920.72 = 4,262.43/x
3. Step 3: Cross multiply
   11,281.80x = 16,920.72 × 4,262.43
4. Step 4: Simplify right side
   11,281.80x = 72,123,384.55
5. Step 5: Solve for x
   x = 72,123,384.55/11,281.80
6. Step 6: Final answer
   x = 6,392.90