Finding the Fourth Proportional to 1,258.83, 1,888.56 and 609.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,258.83 : 1,888.56 = 609.54 : x
2. Step 2: Convert to fraction form
   1,258.83/1,888.56 = 609.54/x
3. Step 3: Cross multiply
   1,258.83x = 1,888.56 × 609.54
4. Step 4: Simplify right side
   1,258.83x = 1,151,152.86
5. Step 5: Solve for x
   x = 1,151,152.86/1,258.83
6. Step 6: Final answer
   x = 914.46