Finding the Fourth Proportional to 9,377.30, 12,940.28 and 5,398.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,377.30 : 12,940.28 = 5,398.56 : x
2. Step 2: Convert to fraction form
   9,377.30/12,940.28 = 5,398.56/x
3. Step 3: Cross multiply
   9,377.30x = 12,940.28 × 5,398.56
4. Step 4: Simplify right side
   9,377.30x = 69,858,878.00
5. Step 5: Solve for x
   x = 69,858,878.00/9,377.30
6. Step 6: Final answer
   x = 7,449.79