Finding the Fourth Proportional to 2,116.50, 2,921.40 and 1,487.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.50 : 2,921.40 = 1,487.21 : x
2. Step 2: Convert to fraction form
   2,116.50/2,921.40 = 1,487.21/x
3. Step 3: Cross multiply
   2,116.50x = 2,921.40 × 1,487.21
4. Step 4: Simplify right side
   2,116.50x = 4,344,720.69
5. Step 5: Solve for x
   x = 4,344,720.69/2,116.50
6. Step 6: Final answer
   x = 2,052.79