Finding the Fourth Proportional to 1,587.82, 2,191.07 and 889.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,587.82 : 2,191.07 = 889.10 : x
2. Step 2: Convert to fraction form
   1,587.82/2,191.07 = 889.10/x
3. Step 3: Cross multiply
   1,587.82x = 2,191.07 × 889.10
4. Step 4: Simplify right side
   1,587.82x = 1,948,080.34
5. Step 5: Solve for x
   x = 1,948,080.34/1,587.82
6. Step 6: Final answer
   x = 1,226.89