Finding the Fourth Proportional to 1,647.12, 2,273.18 and 1,057.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,647.12 : 2,273.18 = 1,057.83 : x
2. Step 2: Convert to fraction form
   1,647.12/2,273.18 = 1,057.83/x
3. Step 3: Cross multiply
   1,647.12x = 2,273.18 × 1,057.83
4. Step 4: Simplify right side
   1,647.12x = 2,404,632.71
5. Step 5: Solve for x
   x = 2,404,632.71/1,647.12
6. Step 6: Final answer
   x = 1,459.90