Finding the Fourth Proportional to 8,709.18, 12,018.92 and 5,124.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,709.18 : 12,018.92 = 5,124.42 : x
2. Step 2: Convert to fraction form
   8,709.18/12,018.92 = 5,124.42/x
3. Step 3: Cross multiply
   8,709.18x = 12,018.92 × 5,124.42
4. Step 4: Simplify right side
   8,709.18x = 61,589,994.03
5. Step 5: Solve for x
   x = 61,589,994.03/8,709.18
6. Step 6: Final answer
   x = 7,071.85