Finding the Fourth Proportional to 9,410.90, 12,981.69 and 8,459.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,410.90 : 12,981.69 = 8,459.54 : x
2. Step 2: Convert to fraction form
   9,410.90/12,981.69 = 8,459.54/x
3. Step 3: Cross multiply
   9,410.90x = 12,981.69 × 8,459.54
4. Step 4: Simplify right side
   9,410.90x = 109,819,125.82
5. Step 5: Solve for x
   x = 109,819,125.82/9,410.90
6. Step 6: Final answer
   x = 11,669.35