Finding the Fourth Proportional to 1,971.50, 2,720.57 and 1,087.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,971.50 : 2,720.57 = 1,087.28 : x
2. Step 2: Convert to fraction form
   1,971.50/2,720.57 = 1,087.28/x
3. Step 3: Cross multiply
   1,971.50x = 2,720.57 × 1,087.28
4. Step 4: Simplify right side
   1,971.50x = 2,958,002.31
5. Step 5: Solve for x
   x = 2,958,002.31/1,971.50
6. Step 6: Final answer
   x = 1,500.39