Finding the Fourth Proportional to 1,803.32, 2,488.53 and 1,017.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,803.32 : 2,488.53 = 1,017.30 : x
2. Step 2: Convert to fraction form
   1,803.32/2,488.53 = 1,017.30/x
3. Step 3: Cross multiply
   1,803.32x = 2,488.53 × 1,017.30
4. Step 4: Simplify right side
   1,803.32x = 2,531,576.48
5. Step 5: Solve for x
   x = 2,531,576.48/1,803.32
6. Step 6: Final answer
   x = 1,403.85