Finding the Fourth Proportional to 3,345.78, 5,018.59 and 1,005.79

Step by Step Solution

1. Step 1: Write the proportion equation
   3,345.78 : 5,018.59 = 1,005.79 : x
2. Step 2: Convert to fraction form
   3,345.78/5,018.59 = 1,005.79/x
3. Step 3: Cross multiply
   3,345.78x = 5,018.59 × 1,005.79
4. Step 4: Simplify right side
   3,345.78x = 5,047,647.64
5. Step 5: Solve for x
   x = 5,047,647.64/3,345.78
6. Step 6: Final answer
   x = 1,508.66