Finding the Fourth Proportional to 1,971.22, 2,719.74 and 1,131.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,971.22 : 2,719.74 = 1,131.88 : x
2. Step 2: Convert to fraction form
   1,971.22/2,719.74 = 1,131.88/x
3. Step 3: Cross multiply
   1,971.22x = 2,719.74 × 1,131.88
4. Step 4: Simplify right side
   1,971.22x = 3,078,419.31
5. Step 5: Solve for x
   x = 3,078,419.31/1,971.22
6. Step 6: Final answer
   x = 1,561.68