Finding the Fourth Proportional to 2,638.51, 3,641.10 and 1,443.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.51 : 3,641.10 = 1,443.47 : x
2. Step 2: Convert to fraction form
   2,638.51/3,641.10 = 1,443.47/x
3. Step 3: Cross multiply
   2,638.51x = 3,641.10 × 1,443.47
4. Step 4: Simplify right side
   2,638.51x = 5,255,803.12
5. Step 5: Solve for x
   x = 5,255,803.12/2,638.51
6. Step 6: Final answer
   x = 1,991.96