Finding the Fourth Proportional to 1,678.31, 2,313.52 and 1,180.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,678.31 : 2,313.52 = 1,180.16 : x
2. Step 2: Convert to fraction form
   1,678.31/2,313.52 = 1,180.16/x
3. Step 3: Cross multiply
   1,678.31x = 2,313.52 × 1,180.16
4. Step 4: Simplify right side
   1,678.31x = 2,730,323.76
5. Step 5: Solve for x
   x = 2,730,323.76/1,678.31
6. Step 6: Final answer
   x = 1,626.83