Finding the Fourth Proportional to 1,012.35, 1,518.52 and 281.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.35 : 1,518.52 = 281.93 : x
2. Step 2: Convert to fraction form
   1,012.35/1,518.52 = 281.93/x
3. Step 3: Cross multiply
   1,012.35x = 1,518.52 × 281.93
4. Step 4: Simplify right side
   1,012.35x = 428,116.34
5. Step 5: Solve for x
   x = 428,116.34/1,012.35
6. Step 6: Final answer
   x = 422.89