Finding the Fourth Proportional to 9,180.72, 12,664.54 and 5,817.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,180.72 : 12,664.54 = 5,817.60 : x
2. Step 2: Convert to fraction form
   9,180.72/12,664.54 = 5,817.60/x
3. Step 3: Cross multiply
   9,180.72x = 12,664.54 × 5,817.60
4. Step 4: Simplify right side
   9,180.72x = 73,677,227.90
5. Step 5: Solve for x
   x = 73,677,227.90/9,180.72
6. Step 6: Final answer
   x = 8,025.21