Finding the Fourth Proportional to 9,418.68, 12,995.82 and 5,439.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,418.68 : 12,995.82 = 5,439.60 : x
2. Step 2: Convert to fraction form
   9,418.68/12,995.82 = 5,439.60/x
3. Step 3: Cross multiply
   9,418.68x = 12,995.82 × 5,439.60
4. Step 4: Simplify right side
   9,418.68x = 70,692,062.47
5. Step 5: Solve for x
   x = 70,692,062.47/9,418.68
6. Step 6: Final answer
   x = 7,505.52