Finding the Fourth Proportional to 7,990.17, 11,031.57 and 5,158.82

Step by Step Solution

1. Step 1: Write the proportion equation
   7,990.17 : 11,031.57 = 5,158.82 : x
2. Step 2: Convert to fraction form
   7,990.17/11,031.57 = 5,158.82/x
3. Step 3: Cross multiply
   7,990.17x = 11,031.57 × 5,158.82
4. Step 4: Simplify right side
   7,990.17x = 56,909,828.79
5. Step 5: Solve for x
   x = 56,909,828.79/7,990.17
6. Step 6: Final answer
   x = 7,122.48