Finding the Fourth Proportional to 2,801.13, 3,865.50 and 1,542.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,801.13 : 3,865.50 = 1,542.12 : x
2. Step 2: Convert to fraction form
   2,801.13/3,865.50 = 1,542.12/x
3. Step 3: Cross multiply
   2,801.13x = 3,865.50 × 1,542.12
4. Step 4: Simplify right side
   2,801.13x = 5,961,064.86
5. Step 5: Solve for x
   x = 5,961,064.86/2,801.13
6. Step 6: Final answer
   x = 2,128.09