Finding the Fourth Proportional to 1,980.78, 2,733.48 and 1,096.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,980.78 : 2,733.48 = 1,096.58 : x
2. Step 2: Convert to fraction form
   1,980.78/2,733.48 = 1,096.58/x
3. Step 3: Cross multiply
   1,980.78x = 2,733.48 × 1,096.58
4. Step 4: Simplify right side
   1,980.78x = 2,997,465.83
5. Step 5: Solve for x
   x = 2,997,465.83/1,980.78
6. Step 6: Final answer
   x = 1,513.28