Finding the Fourth Proportional to 1,803.05, 2,488.46 and 1,057.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,803.05 : 2,488.46 = 1,057.25 : x
2. Step 2: Convert to fraction form
   1,803.05/2,488.46 = 1,057.25/x
3. Step 3: Cross multiply
   1,803.05x = 2,488.46 × 1,057.25
4. Step 4: Simplify right side
   1,803.05x = 2,630,933.20
5. Step 5: Solve for x
   x = 2,630,933.20/1,803.05
6. Step 6: Final answer
   x = 1,459.16