Finding the Fourth Proportional to 6,411.86, 9,619.36 and 3,124.22

Step by Step Solution

1. Step 1: Write the proportion equation
   6,411.86 : 9,619.36 = 3,124.22 : x
2. Step 2: Convert to fraction form
   6,411.86/9,619.36 = 3,124.22/x
3. Step 3: Cross multiply
   6,411.86x = 9,619.36 × 3,124.22
4. Step 4: Simplify right side
   6,411.86x = 30,052,996.90
5. Step 5: Solve for x
   x = 30,052,996.90/6,411.86
6. Step 6: Final answer
   x = 4,687.09