Finding the Fourth Proportional to 9,280.17, 12,735.63 and 9,214.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,280.17 : 12,735.63 = 9,214.56 : x
2. Step 2: Convert to fraction form
   9,280.17/12,735.63 = 9,214.56/x
3. Step 3: Cross multiply
   9,280.17x = 12,735.63 × 9,214.56
4. Step 4: Simplify right side
   9,280.17x = 117,353,226.77
5. Step 5: Solve for x
   x = 117,353,226.77/9,280.17
6. Step 6: Final answer
   x = 12,645.59