Finding the Fourth Proportional to 1,588.78, 2,192.52 and 890.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,588.78 : 2,192.52 = 890.16 : x
2. Step 2: Convert to fraction form
   1,588.78/2,192.52 = 890.16/x
3. Step 3: Cross multiply
   1,588.78x = 2,192.52 × 890.16
4. Step 4: Simplify right side
   1,588.78x = 1,951,693.60
5. Step 5: Solve for x
   x = 1,951,693.60/1,588.78
6. Step 6: Final answer
   x = 1,228.42