Finding the Fourth Proportional to 1,678.52, 2,515.69 and 1,190.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,678.52 : 2,515.69 = 1,190.53 : x
2. Step 2: Convert to fraction form
   1,678.52/2,515.69 = 1,190.53/x
3. Step 3: Cross multiply
   1,678.52x = 2,515.69 × 1,190.53
4. Step 4: Simplify right side
   1,678.52x = 2,995,009.05
5. Step 5: Solve for x
   x = 2,995,009.05/1,678.52
6. Step 6: Final answer
   x = 1,784.31