Finding the Fourth Proportional to 1,586.82, 2,189.69 and 888.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,586.82 : 2,189.69 = 888.10 : x
2. Step 2: Convert to fraction form
   1,586.82/2,189.69 = 888.10/x
3. Step 3: Cross multiply
   1,586.82x = 2,189.69 × 888.10
4. Step 4: Simplify right side
   1,586.82x = 1,944,663.69
5. Step 5: Solve for x
   x = 1,944,663.69/1,586.82
6. Step 6: Final answer
   x = 1,225.51