Finding the Fourth Proportional to 1,057.12, 1,595.56 and 1,057.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057.12 : 1,595.56 = 1,057.12 : x
2. Step 2: Convert to fraction form
   1,057.12/1,595.56 = 1,057.12/x
3. Step 3: Cross multiply
   1,057.12x = 1,595.56 × 1,057.12
4. Step 4: Simplify right side
   1,057.12x = 1,686,698.39
5. Step 5: Solve for x
   x = 1,686,698.39/1,057.12
6. Step 6: Final answer
   x = 1,595.56