Finding the Fourth Proportional to 1,918.46, 2,646.83 and 1,563.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,918.46 : 2,646.83 = 1,563.77 : x
2. Step 2: Convert to fraction form
   1,918.46/2,646.83 = 1,563.77/x
3. Step 3: Cross multiply
   1,918.46x = 2,646.83 × 1,563.77
4. Step 4: Simplify right side
   1,918.46x = 4,139,012.30
5. Step 5: Solve for x
   x = 4,139,012.30/1,918.46
6. Step 6: Final answer
   x = 2,157.47