Finding the Fourth Proportional to 1,570.98, 2,168.04 and 889.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.98 : 2,168.04 = 889.68 : x
2. Step 2: Convert to fraction form
   1,570.98/2,168.04 = 889.68/x
3. Step 3: Cross multiply
   1,570.98x = 2,168.04 × 889.68
4. Step 4: Simplify right side
   1,570.98x = 1,928,861.83
5. Step 5: Solve for x
   x = 1,928,861.83/1,570.98
6. Step 6: Final answer
   x = 1,227.81