Finding the Fourth Proportional to 3,709.74, 5,119.17 and 2,116.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,709.74 : 5,119.17 = 2,116.45 : x
2. Step 2: Convert to fraction form
   3,709.74/5,119.17 = 2,116.45/x
3. Step 3: Cross multiply
   3,709.74x = 5,119.17 × 2,116.45
4. Step 4: Simplify right side
   3,709.74x = 10,834,477.71
5. Step 5: Solve for x
   x = 10,834,477.71/3,709.74
6. Step 6: Final answer
   x = 2,920.55