Finding the Fourth Proportional to 2,478, 3,714.12 and 1,015.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,478 : 3,714.12 = 1,015.38 : x
2. Step 2: Convert to fraction form
   2,478/3,714.12 = 1,015.38/x
3. Step 3: Cross multiply
   2,478x = 3,714.12 × 1,015.38
4. Step 4: Simplify right side
   2,478x = 3,771,243.17
5. Step 5: Solve for x
   x = 3,771,243.17/2,478
6. Step 6: Final answer
   x = 1,521.89