Finding the Fourth Proportional to 1,554.16, 2,144.61 and 890.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,554.16 : 2,144.61 = 890.86 : x
2. Step 2: Convert to fraction form
   1,554.16/2,144.61 = 890.86/x
3. Step 3: Cross multiply
   1,554.16x = 2,144.61 × 890.86
4. Step 4: Simplify right side
   1,554.16x = 1,910,547.26
5. Step 5: Solve for x
   x = 1,910,547.26/1,554.16
6. Step 6: Final answer
   x = 1,229.31