Finding the Fourth Proportional to 1,588.91, 2,187.72 and 1,443.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,588.91 : 2,187.72 = 1,443.11 : x
2. Step 2: Convert to fraction form
   1,588.91/2,187.72 = 1,443.11/x
3. Step 3: Cross multiply
   1,588.91x = 2,187.72 × 1,443.11
4. Step 4: Simplify right side
   1,588.91x = 3,157,109.67
5. Step 5: Solve for x
   x = 3,157,109.67/1,588.91
6. Step 6: Final answer
   x = 1,986.97