Finding the Fourth Proportional to 1,012.35, 1,518.53 and 434.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.35 : 1,518.53 = 434.82 : x
2. Step 2: Convert to fraction form
   1,012.35/1,518.53 = 434.82/x
3. Step 3: Cross multiply
   1,012.35x = 1,518.53 × 434.82
4. Step 4: Simplify right side
   1,012.35x = 660,285.04
5. Step 5: Solve for x
   x = 660,285.04/1,012.35
6. Step 6: Final answer
   x = 652.23