Finding the Fourth Proportional to 2,625.50, 3,939.75 and 1,065.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,625.50 : 3,939.75 = 1,065.21 : x
2. Step 2: Convert to fraction form
   2,625.50/3,939.75 = 1,065.21/x
3. Step 3: Cross multiply
   2,625.50x = 3,939.75 × 1,065.21
4. Step 4: Simplify right side
   2,625.50x = 4,196,661.10
5. Step 5: Solve for x
   x = 4,196,661.10/2,625.50
6. Step 6: Final answer
   x = 1,598.43