Finding the Fourth Proportional to 1,111.12, 1,531.00 and 889.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.12 : 1,531.00 = 889.18 : x
2. Step 2: Convert to fraction form
   1,111.12/1,531.00 = 889.18/x
3. Step 3: Cross multiply
   1,111.12x = 1,531.00 × 889.18
4. Step 4: Simplify right side
   1,111.12x = 1,361,331.86
5. Step 5: Solve for x
   x = 1,361,331.86/1,111.12
6. Step 6: Final answer
   x = 1,225.19