Finding the Fourth Proportional to 9,900.42, 14,850.89 and 2,880.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,900.42 : 14,850.89 = 2,880.15 : x
2. Step 2: Convert to fraction form
   9,900.42/14,850.89 = 2,880.15/x
3. Step 3: Cross multiply
   9,900.42x = 14,850.89 × 2,880.15
4. Step 4: Simplify right side
   9,900.42x = 42,772,790.83
5. Step 5: Solve for x
   x = 42,772,790.83/9,900.42
6. Step 6: Final answer
   x = 4,320.30