Finding the Fourth Proportional to 1,578.51, 2,367.50 and 712.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,578.51 : 2,367.50 = 712.62 : x
2. Step 2: Convert to fraction form
   1,578.51/2,367.50 = 712.62/x
3. Step 3: Cross multiply
   1,578.51x = 2,367.50 × 712.62
4. Step 4: Simplify right side
   1,578.51x = 1,687,124.29
5. Step 5: Solve for x
   x = 1,687,124.29/1,578.51
6. Step 6: Final answer
   x = 1,068.81