Finding the Fourth Proportional to 1,158.71, 1,733.69 and 812.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.71 : 1,733.69 = 812.71 : x
2. Step 2: Convert to fraction form
   1,158.71/1,733.69 = 812.71/x
3. Step 3: Cross multiply
   1,158.71x = 1,733.69 × 812.71
4. Step 4: Simplify right side
   1,158.71x = 1,408,991.40
5. Step 5: Solve for x
   x = 1,408,991.40/1,158.71
6. Step 6: Final answer
   x = 1,216.01