Finding the Fourth Proportional to 2,661.30, 3,672.60 and 1,542.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,661.30 : 3,672.60 = 1,542.45 : x
2. Step 2: Convert to fraction form
   2,661.30/3,672.60 = 1,542.45/x
3. Step 3: Cross multiply
   2,661.30x = 3,672.60 × 1,542.45
4. Step 4: Simplify right side
   2,661.30x = 5,664,801.87
5. Step 5: Solve for x
   x = 5,664,801.87/2,661.30
6. Step 6: Final answer
   x = 2,128.58