Finding the Fourth Proportional to 3,643.86, 5,028.50 and 2,151.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,643.86 : 5,028.50 = 2,151.78 : x
2. Step 2: Convert to fraction form
   3,643.86/5,028.50 = 2,151.78/x
3. Step 3: Cross multiply
   3,643.86x = 5,028.50 × 2,151.78
4. Step 4: Simplify right side
   3,643.86x = 10,820,225.73
5. Step 5: Solve for x
   x = 10,820,225.73/3,643.86
6. Step 6: Final answer
   x = 2,969.44