Finding the Fourth Proportional to 8,955.72, 12,360.03 and 5,418.96

Step by Step Solution

1. Step 1: Write the proportion equation
   8,955.72 : 12,360.03 = 5,418.96 : x
2. Step 2: Convert to fraction form
   8,955.72/12,360.03 = 5,418.96/x
3. Step 3: Cross multiply
   8,955.72x = 12,360.03 × 5,418.96
4. Step 4: Simplify right side
   8,955.72x = 66,978,508.17
5. Step 5: Solve for x
   x = 66,978,508.17/8,955.72
6. Step 6: Final answer
   x = 7,478.85