Finding the Fourth Proportional to 9,145.98, 12,620.21 and 5,608.44

Step by Step Solution

1. Step 1: Write the proportion equation
   9,145.98 : 12,620.21 = 5,608.44 : x
2. Step 2: Convert to fraction form
   9,145.98/12,620.21 = 5,608.44/x
3. Step 3: Cross multiply
   9,145.98x = 12,620.21 × 5,608.44
4. Step 4: Simplify right side
   9,145.98x = 70,779,662.53
5. Step 5: Solve for x
   x = 70,779,662.53/9,145.98
6. Step 6: Final answer
   x = 7,738.88