Finding the Fourth Proportional to 3,491.39, 5,230.06 and 2,100.47

Step by Step Solution

1. Step 1: Write the proportion equation
   3,491.39 : 5,230.06 = 2,100.47 : x
2. Step 2: Convert to fraction form
   3,491.39/5,230.06 = 2,100.47/x
3. Step 3: Cross multiply
   3,491.39x = 5,230.06 × 2,100.47
4. Step 4: Simplify right side
   3,491.39x = 10,985,552.73
5. Step 5: Solve for x
   x = 10,985,552.73/3,491.39
6. Step 6: Final answer
   x = 3,146.47