Finding the Fourth Proportional to 9,997.60, 13,796.79 and 5,521.46

Step by Step Solution

1. Step 1: Write the proportion equation
   9,997.60 : 13,796.79 = 5,521.46 : x
2. Step 2: Convert to fraction form
   9,997.60/13,796.79 = 5,521.46/x
3. Step 3: Cross multiply
   9,997.60x = 13,796.79 × 5,521.46
4. Step 4: Simplify right side
   9,997.60x = 76,178,396.51
5. Step 5: Solve for x
   x = 76,178,396.51/9,997.60
6. Step 6: Final answer
   x = 7,619.67