Finding the Fourth Proportional to 9,145.76, 12,620.50 and 5,369.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,145.76 : 12,620.50 = 5,369.09 : x
2. Step 2: Convert to fraction form
   9,145.76/12,620.50 = 5,369.09/x
3. Step 3: Cross multiply
   9,145.76x = 12,620.50 × 5,369.09
4. Step 4: Simplify right side
   9,145.76x = 67,760,523.82
5. Step 5: Solve for x
   x = 67,760,523.82/9,145.76
6. Step 6: Final answer
   x = 7,408.95