Finding the Fourth Proportional to 9,398.88, 12,970.89 and 5,366.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,398.88 : 12,970.89 = 5,366.80 : x
2. Step 2: Convert to fraction form
   9,398.88/12,970.89 = 5,366.80/x
3. Step 3: Cross multiply
   9,398.88x = 12,970.89 × 5,366.80
4. Step 4: Simplify right side
   9,398.88x = 69,612,145.62
5. Step 5: Solve for x
   x = 69,612,145.62/9,398.88
6. Step 6: Final answer
   x = 7,406.43