Finding the Fourth Proportional to 1,971.50, 2,720.94 and 1,143.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,971.50 : 2,720.94 = 1,143.50 : x
2. Step 2: Convert to fraction form
   1,971.50/2,720.94 = 1,143.50/x
3. Step 3: Cross multiply
   1,971.50x = 2,720.94 × 1,143.50
4. Step 4: Simplify right side
   1,971.50x = 3,111,394.89
5. Step 5: Solve for x
   x = 3,111,394.89/1,971.50
6. Step 6: Final answer
   x = 1,578.19