Finding the Fourth Proportional to 3,643.11, 5,026.32 and 2,151.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,643.11 : 5,026.32 = 2,151.09 : x
2. Step 2: Convert to fraction form
   3,643.11/5,026.32 = 2,151.09/x
3. Step 3: Cross multiply
   3,643.11x = 5,026.32 × 2,151.09
4. Step 4: Simplify right side
   3,643.11x = 10,812,066.69
5. Step 5: Solve for x
   x = 10,812,066.69/3,643.11
6. Step 6: Final answer
   x = 2,967.81