Finding the Fourth Proportional to 1,791.45, 2,472.09 and 1,005.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,791.45 : 2,472.09 = 1,005.42 : x
2. Step 2: Convert to fraction form
   1,791.45/2,472.09 = 1,005.42/x
3. Step 3: Cross multiply
   1,791.45x = 2,472.09 × 1,005.42
4. Step 4: Simplify right side
   1,791.45x = 2,485,488.73
5. Step 5: Solve for x
   x = 2,485,488.73/1,791.45
6. Step 6: Final answer
   x = 1,387.42