Finding the Fourth Proportional to 931.37, 1,387.50 and 889.25

Step by Step Solution

1. Step 1: Write the proportion equation
   931.37 : 1,387.50 = 889.25 : x
2. Step 2: Convert to fraction form
   931.37/1,387.50 = 889.25/x
3. Step 3: Cross multiply
   931.37x = 1,387.50 × 889.25
4. Step 4: Simplify right side
   931.37x = 1,233,824.10
5. Step 5: Solve for x
   x = 1,233,824.10/931.37
6. Step 6: Final answer
   x = 1,324.75