Finding the Fourth Proportional to 1,057.42, 1,585.68 and 1,047.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057.42 : 1,585.68 = 1,047.34 : x
2. Step 2: Convert to fraction form
   1,057.42/1,585.68 = 1,047.34/x
3. Step 3: Cross multiply
   1,057.42x = 1,585.68 × 1,047.34
4. Step 4: Simplify right side
   1,057.42x = 1,660,746.09
5. Step 5: Solve for x
   x = 1,660,746.09/1,057.42
6. Step 6: Final answer
   x = 1,570.56