Finding the Fourth Proportional to 2,141.48, 3,212.18 and 987.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,141.48 : 3,212.18 = 987.23 : x
2. Step 2: Convert to fraction form
   2,141.48/3,212.18 = 987.23/x
3. Step 3: Cross multiply
   2,141.48x = 3,212.18 × 987.23
4. Step 4: Simplify right side
   2,141.48x = 3,171,163.56
5. Step 5: Solve for x
   x = 3,171,163.56/2,141.48
6. Step 6: Final answer
   x = 1,480.83