Finding the Fourth Proportional to 2,141.50, 3,210.81 and 986.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,141.50 : 3,210.81 = 986.62 : x
2. Step 2: Convert to fraction form
   2,141.50/3,210.81 = 986.62/x
3. Step 3: Cross multiply
   2,141.50x = 3,210.81 × 986.62
4. Step 4: Simplify right side
   2,141.50x = 3,167,849.36
5. Step 5: Solve for x
   x = 3,167,849.36/2,141.50
6. Step 6: Final answer
   x = 1,479.27