Finding the Fourth Proportional to 8,913.22, 12,300.86 and 5,328.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,913.22 : 12,300.86 = 5,328.30 : x
2. Step 2: Convert to fraction form
   8,913.22/12,300.86 = 5,328.30/x
3. Step 3: Cross multiply
   8,913.22x = 12,300.86 × 5,328.30
4. Step 4: Simplify right side
   8,913.22x = 65,542,672.34
5. Step 5: Solve for x
   x = 65,542,672.34/8,913.22
6. Step 6: Final answer
   x = 7,353.42