Finding the Fourth Proportional to 9,669.57, 13,351.55 and 7,427.90

Step by Step Solution

1. Step 1: Write the proportion equation
   9,669.57 : 13,351.55 = 7,427.90 : x
2. Step 2: Convert to fraction form
   9,669.57/13,351.55 = 7,427.90/x
3. Step 3: Cross multiply
   9,669.57x = 13,351.55 × 7,427.90
4. Step 4: Simplify right side
   9,669.57x = 99,173,874.35
5. Step 5: Solve for x
   x = 99,173,874.35/9,669.57
6. Step 6: Final answer
   x = 10,256.29