Finding the Fourth Proportional to 2,385.82, 3,578.82 and 654.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.82 : 3,578.82 = 654.45 : x
2. Step 2: Convert to fraction form
   2,385.82/3,578.82 = 654.45/x
3. Step 3: Cross multiply
   2,385.82x = 3,578.82 × 654.45
4. Step 4: Simplify right side
   2,385.82x = 2,342,158.75
5. Step 5: Solve for x
   x = 2,342,158.75/2,385.82
6. Step 6: Final answer
   x = 981.70