Finding the Fourth Proportional to 2,445.72, 3,376.23 and 1,639.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,445.72 : 3,376.23 = 1,639.54 : x
2. Step 2: Convert to fraction form
   2,445.72/3,376.23 = 1,639.54/x
3. Step 3: Cross multiply
   2,445.72x = 3,376.23 × 1,639.54
4. Step 4: Simplify right side
   2,445.72x = 5,535,455.69
5. Step 5: Solve for x
   x = 5,535,455.69/2,445.72
6. Step 6: Final answer
   x = 2,263.33