Finding the Fourth Proportional to 1,588.30, 2,191.86 and 889.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,588.30 : 2,191.86 = 889.67 : x
2. Step 2: Convert to fraction form
   1,588.30/2,191.86 = 889.67/x
3. Step 3: Cross multiply
   1,588.30x = 2,191.86 × 889.67
4. Step 4: Simplify right side
   1,588.30x = 1,950,037.57
5. Step 5: Solve for x
   x = 1,950,037.57/1,588.30
6. Step 6: Final answer
   x = 1,227.75