Finding the Fourth Proportional to 2,080.78, 3,118.74 and 1,156.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.78 : 3,118.74 = 1,156.12 : x
2. Step 2: Convert to fraction form
   2,080.78/3,118.74 = 1,156.12/x
3. Step 3: Cross multiply
   2,080.78x = 3,118.74 × 1,156.12
4. Step 4: Simplify right side
   2,080.78x = 3,605,637.69
5. Step 5: Solve for x
   x = 3,605,637.69/2,080.78
6. Step 6: Final answer
   x = 1,732.83