Finding the Fourth Proportional to 9,900.12, 14,847.96 and 2,880.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,900.12 : 14,847.96 = 2,880.12 : x
2. Step 2: Convert to fraction form
   9,900.12/14,847.96 = 2,880.12/x
3. Step 3: Cross multiply
   9,900.12x = 14,847.96 × 2,880.12
4. Step 4: Simplify right side
   9,900.12x = 42,763,906.56
5. Step 5: Solve for x
   x = 42,763,906.56/9,900.12
6. Step 6: Final answer
   x = 4,319.53