Finding the Fourth Proportional to 1,542.07, 2,321.45 and 1,408.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,542.07 : 2,321.45 = 1,408.15 : x
2. Step 2: Convert to fraction form
   1,542.07/2,321.45 = 1,408.15/x
3. Step 3: Cross multiply
   1,542.07x = 2,321.45 × 1,408.15
4. Step 4: Simplify right side
   1,542.07x = 3,268,949.82
5. Step 5: Solve for x
   x = 3,268,949.82/1,542.07
6. Step 6: Final answer
   x = 2,119.85