Finding the Fourth Proportional to 5,677.58, 8,513.94 and 1,978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,677.58 : 8,513.94 = 1,978.72 : x
2. Step 2: Convert to fraction form
   5,677.58/8,513.94 = 1,978.72/x
3. Step 3: Cross multiply
   5,677.58x = 8,513.94 × 1,978.72
4. Step 4: Simplify right side
   5,677.58x = 16,846,689.49
5. Step 5: Solve for x
   x = 16,846,689.49/5,677.58
6. Step 6: Final answer
   x = 2,967.23