Finding the Fourth Proportional to 1,587.68, 2,190.98 and 889.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,587.68 : 2,190.98 = 889.05 : x
2. Step 2: Convert to fraction form
   1,587.68/2,190.98 = 889.05/x
3. Step 3: Cross multiply
   1,587.68x = 2,190.98 × 889.05
4. Step 4: Simplify right side
   1,587.68x = 1,947,886.32
5. Step 5: Solve for x
   x = 1,947,886.32/1,587.68
6. Step 6: Final answer
   x = 1,226.88