Finding the Fourth Proportional to 1,678.59, 2,314.98 and 1,089.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,678.59 : 2,314.98 = 1,089.32 : x
2. Step 2: Convert to fraction form
   1,678.59/2,314.98 = 1,089.32/x
3. Step 3: Cross multiply
   1,678.59x = 2,314.98 × 1,089.32
4. Step 4: Simplify right side
   1,678.59x = 2,521,742.44
5. Step 5: Solve for x
   x = 2,521,742.44/1,678.59
6. Step 6: Final answer
   x = 1,502.30