Finding the Fourth Proportional to 1,181.58, 1,768.73 and 1,080.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,181.58 : 1,768.73 = 1,080.78 : x
2. Step 2: Convert to fraction form
   1,181.58/1,768.73 = 1,080.78/x
3. Step 3: Cross multiply
   1,181.58x = 1,768.73 × 1,080.78
4. Step 4: Simplify right side
   1,181.58x = 1,911,602.61
5. Step 5: Solve for x
   x = 1,911,602.61/1,181.58
6. Step 6: Final answer
   x = 1,617.84