Finding the Fourth Proportional to 9,418.56, 12,997.76 and 5,440.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,418.56 : 12,997.76 = 5,440.48 : x
2. Step 2: Convert to fraction form
   9,418.56/12,997.76 = 5,440.48/x
3. Step 3: Cross multiply
   9,418.56x = 12,997.76 × 5,440.48
4. Step 4: Simplify right side
   9,418.56x = 70,714,053.32
5. Step 5: Solve for x
   x = 70,714,053.32/9,418.56
6. Step 6: Final answer
   x = 7,507.95