Finding the Fourth Proportional to 1,791.37, 2,471.64 and 1,005.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,791.37 : 2,471.64 = 1,005.43 : x
2. Step 2: Convert to fraction form
   1,791.37/2,471.64 = 1,005.43/x
3. Step 3: Cross multiply
   1,791.37x = 2,471.64 × 1,005.43
4. Step 4: Simplify right side
   1,791.37x = 2,485,061.01
5. Step 5: Solve for x
   x = 2,485,061.01/1,791.37
6. Step 6: Final answer
   x = 1,387.24