Finding the Fourth Proportional to 1,588.32, 2,191.89 and 889.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,588.32 : 2,191.89 = 889.70 : x
2. Step 2: Convert to fraction form
   1,588.32/2,191.89 = 889.70/x
3. Step 3: Cross multiply
   1,588.32x = 2,191.89 × 889.70
4. Step 4: Simplify right side
   1,588.32x = 1,950,113.57
5. Step 5: Solve for x
   x = 1,950,113.57/1,588.32
6. Step 6: Final answer
   x = 1,227.78