Finding the Fourth Proportional to 2,738.58, 4,109.70 and 1,007.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,738.58 : 4,109.70 = 1,007.21 : x
2. Step 2: Convert to fraction form
   2,738.58/4,109.70 = 1,007.21/x
3. Step 3: Cross multiply
   2,738.58x = 4,109.70 × 1,007.21
4. Step 4: Simplify right side
   2,738.58x = 4,139,316.21
5. Step 5: Solve for x
   x = 4,139,316.21/2,738.58
6. Step 6: Final answer
   x = 1,511.48