Finding the Fourth Proportional to 1,578.72, 2,368.57 and 654.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,578.72 : 2,368.57 = 654.71 : x
2. Step 2: Convert to fraction form
   1,578.72/2,368.57 = 654.71/x
3. Step 3: Cross multiply
   1,578.72x = 2,368.57 × 654.71
4. Step 4: Simplify right side
   1,578.72x = 1,550,726.46
5. Step 5: Solve for x
   x = 1,550,726.46/1,578.72
6. Step 6: Final answer
   x = 982.27