Finding the Fourth Proportional to 1,797.72, 2,691.64 and 1,213.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,797.72 : 2,691.64 = 1,213.71 : x
2. Step 2: Convert to fraction form
   1,797.72/2,691.64 = 1,213.71/x
3. Step 3: Cross multiply
   1,797.72x = 2,691.64 × 1,213.71
4. Step 4: Simplify right side
   1,797.72x = 3,266,870.38
5. Step 5: Solve for x
   x = 3,266,870.38/1,797.72
6. Step 6: Final answer
   x = 1,817.23