Finding the Fourth Proportional to 7,991.43, 11,016.33 and 5,158.59

Step by Step Solution

1. Step 1: Write the proportion equation
   7,991.43 : 11,016.33 = 5,158.59 : x
2. Step 2: Convert to fraction form
   7,991.43/11,016.33 = 5,158.59/x
3. Step 3: Cross multiply
   7,991.43x = 11,016.33 × 5,158.59
4. Step 4: Simplify right side
   7,991.43x = 56,828,683.63
5. Step 5: Solve for x
   x = 56,828,683.63/7,991.43
6. Step 6: Final answer
   x = 7,111.20