Finding the Fourth Proportional to 8,899.70, 12,286.76 and 5,364.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,899.70 : 12,286.76 = 5,364.05 : x
2. Step 2: Convert to fraction form
   8,899.70/12,286.76 = 5,364.05/x
3. Step 3: Cross multiply
   8,899.70x = 12,286.76 × 5,364.05
4. Step 4: Simplify right side
   8,899.70x = 65,906,706.72
5. Step 5: Solve for x
   x = 65,906,706.72/8,899.70
6. Step 6: Final answer
   x = 7,405.50