Finding the Fourth Proportional to 7,961.29, 10,991.64 and 5,447.59

Step by Step Solution

1. Step 1: Write the proportion equation
   7,961.29 : 10,991.64 = 5,447.59 : x
2. Step 2: Convert to fraction form
   7,961.29/10,991.64 = 5,447.59/x
3. Step 3: Cross multiply
   7,961.29x = 10,991.64 × 5,447.59
4. Step 4: Simplify right side
   7,961.29x = 59,877,948.15
5. Step 5: Solve for x
   x = 59,877,948.15/7,961.29
6. Step 6: Final answer
   x = 7,521.14