Finding the Fourth Proportional to 1,150.12, 1,725.99 and 890.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.12 : 1,725.99 = 890.72 : x
2. Step 2: Convert to fraction form
   1,150.12/1,725.99 = 890.72/x
3. Step 3: Cross multiply
   1,150.12x = 1,725.99 × 890.72
4. Step 4: Simplify right side
   1,150.12x = 1,537,360.73
5. Step 5: Solve for x
   x = 1,537,360.73/1,150.12
6. Step 6: Final answer
   x = 1,336.70