Finding the Fourth Proportional to 1,768.64, 2,650.56 and 890.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,768.64 : 2,650.56 = 890.24 : x
2. Step 2: Convert to fraction form
   1,768.64/2,650.56 = 890.24/x
3. Step 3: Cross multiply
   1,768.64x = 2,650.56 × 890.24
4. Step 4: Simplify right side
   1,768.64x = 2,359,634.53
5. Step 5: Solve for x
   x = 2,359,634.53/1,768.64
6. Step 6: Final answer
   x = 1,334.15