Finding the Fourth Proportional to 6,411.34, 9,618.56 and 3,123.68

Step by Step Solution

1. Step 1: Write the proportion equation
   6,411.34 : 9,618.56 = 3,123.68 : x
2. Step 2: Convert to fraction form
   6,411.34/9,618.56 = 3,123.68/x
3. Step 3: Cross multiply
   6,411.34x = 9,618.56 × 3,123.68
4. Step 4: Simplify right side
   6,411.34x = 30,045,303.50
5. Step 5: Solve for x
   x = 30,045,303.50/6,411.34
6. Step 6: Final answer
   x = 4,686.28