Finding the Fourth Proportional to 3,345.31, 5,018.25 and 1,005.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,345.31 : 5,018.25 = 1,005.15 : x
2. Step 2: Convert to fraction form
   3,345.31/5,018.25 = 1,005.15/x
3. Step 3: Cross multiply
   3,345.31x = 5,018.25 × 1,005.15
4. Step 4: Simplify right side
   3,345.31x = 5,044,116.58
5. Step 5: Solve for x
   x = 5,044,116.58/3,345.31
6. Step 6: Final answer
   x = 1,507.82