Finding the Fourth Proportional to 1,542.83, 2,131.42 and 1,012.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,542.83 : 2,131.42 = 1,012.97 : x
2. Step 2: Convert to fraction form
   1,542.83/2,131.42 = 1,012.97/x
3. Step 3: Cross multiply
   1,542.83x = 2,131.42 × 1,012.97
4. Step 4: Simplify right side
   1,542.83x = 2,159,064.52
5. Step 5: Solve for x
   x = 2,159,064.52/1,542.83
6. Step 6: Final answer
   x = 1,399.42