Finding the Fourth Proportional to 1,588.07, 2,191.42 and 889.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,588.07 : 2,191.42 = 889.31 : x
2. Step 2: Convert to fraction form
   1,588.07/2,191.42 = 889.31/x
3. Step 3: Cross multiply
   1,588.07x = 2,191.42 × 889.31
4. Step 4: Simplify right side
   1,588.07x = 1,948,858.31
5. Step 5: Solve for x
   x = 1,948,858.31/1,588.07
6. Step 6: Final answer
   x = 1,227.18