Finding the Fourth Proportional to 9,970.79, 13,759.47 and 5,494.43

Step by Step Solution

1. Step 1: Write the proportion equation
   9,970.79 : 13,759.47 = 5,494.43 : x
2. Step 2: Convert to fraction form
   9,970.79/13,759.47 = 5,494.43/x
3. Step 3: Cross multiply
   9,970.79x = 13,759.47 × 5,494.43
4. Step 4: Simplify right side
   9,970.79x = 75,600,375.95
5. Step 5: Solve for x
   x = 75,600,375.95/9,970.79
6. Step 6: Final answer
   x = 7,582.19