Finding the Fourth Proportional to 1,570.54, 2,356.20 and 1,109.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.54 : 2,356.20 = 1,109.23 : x
2. Step 2: Convert to fraction form
   1,570.54/2,356.20 = 1,109.23/x
3. Step 3: Cross multiply
   1,570.54x = 2,356.20 × 1,109.23
4. Step 4: Simplify right side
   1,570.54x = 2,613,567.73
5. Step 5: Solve for x
   x = 2,613,567.73/1,570.54
6. Step 6: Final answer
   x = 1,664.12