Finding the Fourth Proportional to 9,399.58, 12,972.08 and 5,366.59

Step by Step Solution

1. Step 1: Write the proportion equation
   9,399.58 : 12,972.08 = 5,366.59 : x
2. Step 2: Convert to fraction form
   9,399.58/12,972.08 = 5,366.59/x
3. Step 3: Cross multiply
   9,399.58x = 12,972.08 × 5,366.59
4. Step 4: Simplify right side
   9,399.58x = 69,615,815.79
5. Step 5: Solve for x
   x = 69,615,815.79/9,399.58
6. Step 6: Final answer
   x = 7,406.27