Finding the Fourth Proportional to 6,411.18, 9,618.39 and 1,968.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,411.18 : 9,618.39 = 1,968.72 : x
2. Step 2: Convert to fraction form
   6,411.18/9,618.39 = 1,968.72/x
3. Step 3: Cross multiply
   6,411.18x = 9,618.39 × 1,968.72
4. Step 4: Simplify right side
   6,411.18x = 18,935,916.76
5. Step 5: Solve for x
   x = 18,935,916.76/6,411.18
6. Step 6: Final answer
   x = 2,953.58