Finding the Fourth Proportional to 9,410.99, 12,989.50 and 5,431.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,410.99 : 12,989.50 = 5,431.52 : x
2. Step 2: Convert to fraction form
   9,410.99/12,989.50 = 5,431.52/x
3. Step 3: Cross multiply
   9,410.99x = 12,989.50 × 5,431.52
4. Step 4: Simplify right side
   9,410.99x = 70,552,747.93
5. Step 5: Solve for x
   x = 70,552,747.93/9,410.99
6. Step 6: Final answer
   x = 7,496.85