Finding the Fourth Proportional to 1,791.78, 2,472.66 and 1,005.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,791.78 : 2,472.66 = 1,005.83 : x
2. Step 2: Convert to fraction form
   1,791.78/2,472.66 = 1,005.83/x
3. Step 3: Cross multiply
   1,791.78x = 2,472.66 × 1,005.83
4. Step 4: Simplify right side
   1,791.78x = 2,487,075.61
5. Step 5: Solve for x
   x = 2,487,075.61/1,791.78
6. Step 6: Final answer
   x = 1,388.05