Finding the Fourth Proportional to 9,286.61, 12,806.81 and 7,404.45

Step by Step Solution

1. Step 1: Write the proportion equation
   9,286.61 : 12,806.81 = 7,404.45 : x
2. Step 2: Convert to fraction form
   9,286.61/12,806.81 = 7,404.45/x
3. Step 3: Cross multiply
   9,286.61x = 12,806.81 × 7,404.45
4. Step 4: Simplify right side
   9,286.61x = 94,827,384.30
5. Step 5: Solve for x
   x = 94,827,384.30/9,286.61
6. Step 6: Final answer
   x = 10,211.19