Finding the Fourth Proportional to 3,571.51, 4,927.89 and 2,155.43

Step by Step Solution

1. Step 1: Write the proportion equation
   3,571.51 : 4,927.89 = 2,155.43 : x
2. Step 2: Convert to fraction form
   3,571.51/4,927.89 = 2,155.43/x
3. Step 3: Cross multiply
   3,571.51x = 4,927.89 × 2,155.43
4. Step 4: Simplify right side
   3,571.51x = 10,621,686.53
5. Step 5: Solve for x
   x = 10,621,686.53/3,571.51
6. Step 6: Final answer
   x = 2,974.00