Finding the Fourth Proportional to 9,050.42, 12,489.57 and 5,513.64

Step by Step Solution

1. Step 1: Write the proportion equation
   9,050.42 : 12,489.57 = 5,513.64 : x
2. Step 2: Convert to fraction form
   9,050.42/12,489.57 = 5,513.64/x
3. Step 3: Cross multiply
   9,050.42x = 12,489.57 × 5,513.64
4. Step 4: Simplify right side
   9,050.42x = 68,862,992.73
5. Step 5: Solve for x
   x = 68,862,992.73/9,050.42
6. Step 6: Final answer
   x = 7,608.82