Finding the Fourth Proportional to 1,791.38, 2,680.72 and 1,321.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,791.38 : 2,680.72 = 1,321.74 : x
2. Step 2: Convert to fraction form
   1,791.38/2,680.72 = 1,321.74/x
3. Step 3: Cross multiply
   1,791.38x = 2,680.72 × 1,321.74
4. Step 4: Simplify right side
   1,791.38x = 3,543,218.98
5. Step 5: Solve for x
   x = 3,543,218.98/1,791.38
6. Step 6: Final answer
   x = 1,977.92