Finding the Fourth Proportional to 5,677.43, 8,513.71 and 1,978.56

Step by Step Solution

1. Step 1: Write the proportion equation
   5,677.43 : 8,513.71 = 1,978.56 : x
2. Step 2: Convert to fraction form
   5,677.43/8,513.71 = 1,978.56/x
3. Step 3: Cross multiply
   5,677.43x = 8,513.71 × 1,978.56
4. Step 4: Simplify right side
   5,677.43x = 16,844,894.23
5. Step 5: Solve for x
   x = 16,844,894.23/5,677.43
6. Step 6: Final answer
   x = 2,966.99