Finding the Fourth Proportional to 1,012.96, 1,518.32 and 435.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.96 : 1,518.32 = 435.52 : x
2. Step 2: Convert to fraction form
   1,012.96/1,518.32 = 435.52/x
3. Step 3: Cross multiply
   1,012.96x = 1,518.32 × 435.52
4. Step 4: Simplify right side
   1,012.96x = 661,258.73
5. Step 5: Solve for x
   x = 661,258.73/1,012.96
6. Step 6: Final answer
   x = 652.80