Finding the Fourth Proportional to 1,156.45, 1,596.41 and 890.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,156.45 : 1,596.41 = 890.79 : x
2. Step 2: Convert to fraction form
   1,156.45/1,596.41 = 890.79/x
3. Step 3: Cross multiply
   1,156.45x = 1,596.41 × 890.79
4. Step 4: Simplify right side
   1,156.45x = 1,422,066.06
5. Step 5: Solve for x
   x = 1,422,066.06/1,156.45
6. Step 6: Final answer
   x = 1,229.68