Finding the Fourth Proportional to 2,648.06, 3,971.17 and 1,005.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.06 : 3,971.17 = 1,005.07 : x
2. Step 2: Convert to fraction form
   2,648.06/3,971.17 = 1,005.07/x
3. Step 3: Cross multiply
   2,648.06x = 3,971.17 × 1,005.07
4. Step 4: Simplify right side
   2,648.06x = 3,991,303.83
5. Step 5: Solve for x
   x = 3,991,303.83/2,648.06
6. Step 6: Final answer
   x = 1,507.26