Finding the Fourth Proportional to 1,803.21, 2,488.89 and 1,017.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,803.21 : 2,488.89 = 1,017.72 : x
2. Step 2: Convert to fraction form
   1,803.21/2,488.89 = 1,017.72/x
3. Step 3: Cross multiply
   1,803.21x = 2,488.89 × 1,017.72
4. Step 4: Simplify right side
   1,803.21x = 2,532,993.13
5. Step 5: Solve for x
   x = 2,532,993.13/1,803.21
6. Step 6: Final answer
   x = 1,404.71