Finding the Fourth Proportional to 1,791.50, 2,472.28 and 1,005.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,791.50 : 2,472.28 = 1,005.56 : x
2. Step 2: Convert to fraction form
   1,791.50/2,472.28 = 1,005.56/x
3. Step 3: Cross multiply
   1,791.50x = 2,472.28 × 1,005.56
4. Step 4: Simplify right side
   1,791.50x = 2,486,025.88
5. Step 5: Solve for x
   x = 2,486,025.88/1,791.50
6. Step 6: Final answer
   x = 1,387.68