Finding the Fourth Proportional to 9,899.89, 14,834.21 and 3,651.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,899.89 : 14,834.21 = 3,651.30 : x
2. Step 2: Convert to fraction form
   9,899.89/14,834.21 = 3,651.30/x
3. Step 3: Cross multiply
   9,899.89x = 14,834.21 × 3,651.30
4. Step 4: Simplify right side
   9,899.89x = 54,164,132.72
5. Step 5: Solve for x
   x = 54,164,132.72/9,899.89
6. Step 6: Final answer
   x = 5,471.19