Finding the Fourth Proportional to 2,661.45, 3,672.81 and 1,542.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,661.45 : 3,672.81 = 1,542.39 : x
2. Step 2: Convert to fraction form
   2,661.45/3,672.81 = 1,542.39/x
3. Step 3: Cross multiply
   2,661.45x = 3,672.81 × 1,542.39
4. Step 4: Simplify right side
   2,661.45x = 5,664,905.42
5. Step 5: Solve for x
   x = 5,664,905.42/2,661.45
6. Step 6: Final answer
   x = 2,128.50