Finding the Fourth Proportional to 1,588.71, 2,192.42 and 890.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,588.71 : 2,192.42 = 890.09 : x
2. Step 2: Convert to fraction form
   1,588.71/2,192.42 = 890.09/x
3. Step 3: Cross multiply
   1,588.71x = 2,192.42 × 890.09
4. Step 4: Simplify right side
   1,588.71x = 1,951,451.12
5. Step 5: Solve for x
   x = 1,951,451.12/1,588.71
6. Step 6: Final answer
   x = 1,228.32