Finding the Fourth Proportional to 9,997.71, 13,796.75 and 5,521.47

Step by Step Solution

1. Step 1: Write the proportion equation
   9,997.71 : 13,796.75 = 5,521.47 : x
2. Step 2: Convert to fraction form
   9,997.71/13,796.75 = 5,521.47/x
3. Step 3: Cross multiply
   9,997.71x = 13,796.75 × 5,521.47
4. Step 4: Simplify right side
   9,997.71x = 76,178,313.62
5. Step 5: Solve for x
   x = 76,178,313.62/9,997.71
6. Step 6: Final answer
   x = 7,619.58