Finding the Fourth Proportional to 3,443.90, 4,749.76 and 2,117.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,443.90 : 4,749.76 = 2,117.12 : x
2. Step 2: Convert to fraction form
   3,443.90/4,749.76 = 2,117.12/x
3. Step 3: Cross multiply
   3,443.90x = 4,749.76 × 2,117.12
4. Step 4: Simplify right side
   3,443.90x = 10,055,811.89
5. Step 5: Solve for x
   x = 10,055,811.89/3,443.90
6. Step 6: Final answer
   x = 2,919.89