Finding the Fourth Proportional to 931.37, 1,397.22 and 759.56

Step by Step Solution

1. Step 1: Write the proportion equation
   931.37 : 1,397.22 = 759.56 : x
2. Step 2: Convert to fraction form
   931.37/1,397.22 = 759.56/x
3. Step 3: Cross multiply
   931.37x = 1,397.22 × 759.56
4. Step 4: Simplify right side
   931.37x = 1,061,262.59
5. Step 5: Solve for x
   x = 1,061,262.59/931.37
6. Step 6: Final answer
   x = 1,139.47