Finding the Fourth Proportional to 1,678.56, 2,513.52 and 1,419.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,678.56 : 2,513.52 = 1,419.36 : x
2. Step 2: Convert to fraction form
   1,678.56/2,513.52 = 1,419.36/x
3. Step 3: Cross multiply
   1,678.56x = 2,513.52 × 1,419.36
4. Step 4: Simplify right side
   1,678.56x = 3,567,589.75
5. Step 5: Solve for x
   x = 3,567,589.75/1,678.56
6. Step 6: Final answer
   x = 2,125.39