Finding the Fourth Proportional to 2,649.06, 3,973.17 and 1,005.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,649.06 : 3,973.17 = 1,005.21 : x
2. Step 2: Convert to fraction form
   2,649.06/3,973.17 = 1,005.21/x
3. Step 3: Cross multiply
   2,649.06x = 3,973.17 × 1,005.21
4. Step 4: Simplify right side
   2,649.06x = 3,993,870.22
5. Step 5: Solve for x
   x = 3,993,870.22/2,649.06
6. Step 6: Final answer
   x = 1,507.66