Finding the Fourth Proportional to 1,136.96, 1,703.52 and 810.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,136.96 : 1,703.52 = 810.72 : x
2. Step 2: Convert to fraction form
   1,136.96/1,703.52 = 810.72/x
3. Step 3: Cross multiply
   1,136.96x = 1,703.52 × 810.72
4. Step 4: Simplify right side
   1,136.96x = 1,381,077.73
5. Step 5: Solve for x
   x = 1,381,077.73/1,136.96
6. Step 6: Final answer
   x = 1,214.71