Finding the Fourth Proportional to 1,971.57, 2,720.78 and 1,087.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,971.57 : 2,720.78 = 1,087.37 : x
2. Step 2: Convert to fraction form
   1,971.57/2,720.78 = 1,087.37/x
3. Step 3: Cross multiply
   1,971.57x = 2,720.78 × 1,087.37
4. Step 4: Simplify right side
   1,971.57x = 2,958,494.55
5. Step 5: Solve for x
   x = 2,958,494.55/1,971.57
6. Step 6: Final answer
   x = 1,500.58