Finding the Fourth Proportional to 1,638.67, 2,259.57 and 1,483.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,638.67 : 2,259.57 = 1,483.15 : x
2. Step 2: Convert to fraction form
   1,638.67/2,259.57 = 1,483.15/x
3. Step 3: Cross multiply
   1,638.67x = 2,259.57 × 1,483.15
4. Step 4: Simplify right side
   1,638.67x = 3,351,281.25
5. Step 5: Solve for x
   x = 3,351,281.25/1,638.67
6. Step 6: Final answer
   x = 2,045.12