Finding the Fourth Proportional to 2,168.38, 2,990.82 and 1,563.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,168.38 : 2,990.82 = 1,563.85 : x
2. Step 2: Convert to fraction form
   2,168.38/2,990.82 = 1,563.85/x
3. Step 3: Cross multiply
   2,168.38x = 2,990.82 × 1,563.85
4. Step 4: Simplify right side
   2,168.38x = 4,677,193.86
5. Step 5: Solve for x
   x = 4,677,193.86/2,168.38
6. Step 6: Final answer
   x = 2,157.00