Finding the Fourth Proportional to 1,728.72, 2,591.46 and 1,181.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.72 : 2,591.46 = 1,181.16 : x
2. Step 2: Convert to fraction form
   1,728.72/2,591.46 = 1,181.16/x
3. Step 3: Cross multiply
   1,728.72x = 2,591.46 × 1,181.16
4. Step 4: Simplify right side
   1,728.72x = 3,060,928.89
5. Step 5: Solve for x
   x = 3,060,928.89/1,728.72
6. Step 6: Final answer
   x = 1,770.63