Finding the Fourth Proportional to 9,970.21, 13,759.49 and 5,493.95

Step by Step Solution

1. Step 1: Write the proportion equation
   9,970.21 : 13,759.49 = 5,493.95 : x
2. Step 2: Convert to fraction form
   9,970.21/13,759.49 = 5,493.95/x
3. Step 3: Cross multiply
   9,970.21x = 13,759.49 × 5,493.95
4. Step 4: Simplify right side
   9,970.21x = 75,593,984.48
5. Step 5: Solve for x
   x = 75,593,984.48/9,970.21
6. Step 6: Final answer
   x = 7,581.99