Finding the Fourth Proportional to 1,570.96, 2,168.58 and 1,123.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.96 : 2,168.58 = 1,123.30 : x
2. Step 2: Convert to fraction form
   1,570.96/2,168.58 = 1,123.30/x
3. Step 3: Cross multiply
   1,570.96x = 2,168.58 × 1,123.30
4. Step 4: Simplify right side
   1,570.96x = 2,435,965.91
5. Step 5: Solve for x
   x = 2,435,965.91/1,570.96
6. Step 6: Final answer
   x = 1,550.62