Finding the Fourth Proportional to 6,412.28, 9,619.61 and 3,124.49

Step by Step Solution

1. Step 1: Write the proportion equation
   6,412.28 : 9,619.61 = 3,124.49 : x
2. Step 2: Convert to fraction form
   6,412.28/9,619.61 = 3,124.49/x
3. Step 3: Cross multiply
   6,412.28x = 9,619.61 × 3,124.49
4. Step 4: Simplify right side
   6,412.28x = 30,056,311.53
5. Step 5: Solve for x
   x = 30,056,311.53/6,412.28
6. Step 6: Final answer
   x = 4,687.31