Finding the Fourth Proportional to 1,618.72, 2,233.79 and 910.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,618.72 : 2,233.79 = 910.64 : x
2. Step 2: Convert to fraction form
   1,618.72/2,233.79 = 910.64/x
3. Step 3: Cross multiply
   1,618.72x = 2,233.79 × 910.64
4. Step 4: Simplify right side
   1,618.72x = 2,034,178.53
5. Step 5: Solve for x
   x = 2,034,178.53/1,618.72
6. Step 6: Final answer
   x = 1,256.66