Finding the Fourth Proportional to 9,360.70, 12,912.08 and 5,581.34

Step by Step Solution

1. Step 1: Write the proportion equation
   9,360.70 : 12,912.08 = 5,581.34 : x
2. Step 2: Convert to fraction form
   9,360.70/12,912.08 = 5,581.34/x
3. Step 3: Cross multiply
   9,360.70x = 12,912.08 × 5,581.34
4. Step 4: Simplify right side
   9,360.70x = 72,066,708.59
5. Step 5: Solve for x
   x = 72,066,708.59/9,360.70
6. Step 6: Final answer
   x = 7,698.86