Finding the Fourth Proportional to 1,199.72, 1,790.92 and 1,151.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,199.72 : 1,790.92 = 1,151.12 : x
2. Step 2: Convert to fraction form
   1,199.72/1,790.92 = 1,151.12/x
3. Step 3: Cross multiply
   1,199.72x = 1,790.92 × 1,151.12
4. Step 4: Simplify right side
   1,199.72x = 2,061,563.83
5. Step 5: Solve for x
   x = 2,061,563.83/1,199.72
6. Step 6: Final answer
   x = 1,718.37