Finding the Fourth Proportional to 1,971.71, 2,720.96 and 1,087.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,971.71 : 2,720.96 = 1,087.59 : x
2. Step 2: Convert to fraction form
   1,971.71/2,720.96 = 1,087.59/x
3. Step 3: Cross multiply
   1,971.71x = 2,720.96 × 1,087.59
4. Step 4: Simplify right side
   1,971.71x = 2,959,288.89
5. Step 5: Solve for x
   x = 2,959,288.89/1,971.71
6. Step 6: Final answer
   x = 1,500.87