Finding the Fourth Proportional to 1,586.72, 2,189.88 and 888.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,586.72 : 2,189.88 = 888.32 : x
2. Step 2: Convert to fraction form
   1,586.72/2,189.88 = 888.32/x
3. Step 3: Cross multiply
   1,586.72x = 2,189.88 × 888.32
4. Step 4: Simplify right side
   1,586.72x = 1,945,314.20
5. Step 5: Solve for x
   x = 1,945,314.20/1,586.72
6. Step 6: Final answer
   x = 1,226.00