Finding the Fourth Proportional to 4,411.42, 6,619.72 and 1,640.02

Step by Step Solution

1. Step 1: Write the proportion equation
   4,411.42 : 6,619.72 = 1,640.02 : x
2. Step 2: Convert to fraction form
   4,411.42/6,619.72 = 1,640.02/x
3. Step 3: Cross multiply
   4,411.42x = 6,619.72 × 1,640.02
4. Step 4: Simplify right side
   4,411.42x = 10,856,473.19
5. Step 5: Solve for x
   x = 10,856,473.19/4,411.42
6. Step 6: Final answer
   x = 2,460.99