Finding the Fourth Proportional to 9,990.72, 14,976.28 and 4,793.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,990.72 : 14,976.28 = 4,793.76 : x
2. Step 2: Convert to fraction form
   9,990.72/14,976.28 = 4,793.76/x
3. Step 3: Cross multiply
   9,990.72x = 14,976.28 × 4,793.76
4. Step 4: Simplify right side
   9,990.72x = 71,792,692.01
5. Step 5: Solve for x
   x = 71,792,692.01/9,990.72
6. Step 6: Final answer
   x = 7,185.94