Finding the Fourth Proportional to 1,625.72, 2,443.43 and 1,431.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,625.72 : 2,443.43 = 1,431.32 : x
2. Step 2: Convert to fraction form
   1,625.72/2,443.43 = 1,431.32/x
3. Step 3: Cross multiply
   1,625.72x = 2,443.43 × 1,431.32
4. Step 4: Simplify right side
   1,625.72x = 3,497,321.59
5. Step 5: Solve for x
   x = 3,497,321.59/1,625.72
6. Step 6: Final answer
   x = 2,151.25