Finding the Fourth Proportional to 9,398.52, 12,970.46 and 5,419.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,398.52 : 12,970.46 = 5,419.80 : x
2. Step 2: Convert to fraction form
   9,398.52/12,970.46 = 5,419.80/x
3. Step 3: Cross multiply
   9,398.52x = 12,970.46 × 5,419.80
4. Step 4: Simplify right side
   9,398.52x = 70,297,312.66
5. Step 5: Solve for x
   x = 70,297,312.66/9,398.52
6. Step 6: Final answer
   x = 7,479.62