Finding the Fourth Proportional to 2,649.18, 3,973.20 and 1,005.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,649.18 : 3,973.20 = 1,005.15 : x
2. Step 2: Convert to fraction form
   2,649.18/3,973.20 = 1,005.15/x
3. Step 3: Cross multiply
   2,649.18x = 3,973.20 × 1,005.15
4. Step 4: Simplify right side
   2,649.18x = 3,993,661.98
5. Step 5: Solve for x
   x = 3,993,661.98/2,649.18
6. Step 6: Final answer
   x = 1,507.51