Finding the Fourth Proportional to 1,618.78, 2,233.86 and 910.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,618.78 : 2,233.86 = 910.64 : x
2. Step 2: Convert to fraction form
   1,618.78/2,233.86 = 910.64/x
3. Step 3: Cross multiply
   1,618.78x = 2,233.86 × 910.64
4. Step 4: Simplify right side
   1,618.78x = 2,034,231.10
5. Step 5: Solve for x
   x = 2,034,231.10/1,618.78
6. Step 6: Final answer
   x = 1,256.64