Finding the Fourth Proportional to 1,065.34, 1,588.89 and 912.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.34 : 1,588.89 = 912.25 : x
2. Step 2: Convert to fraction form
   1,065.34/1,588.89 = 912.25/x
3. Step 3: Cross multiply
   1,065.34x = 1,588.89 × 912.25
4. Step 4: Simplify right side
   1,065.34x = 1,449,464.90
5. Step 5: Solve for x
   x = 1,449,464.90/1,065.34
6. Step 6: Final answer
   x = 1,360.57