Finding the Fourth Proportional to 1,971.43, 2,957.83 and 876.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,971.43 : 2,957.83 = 876.58 : x
2. Step 2: Convert to fraction form
   1,971.43/2,957.83 = 876.58/x
3. Step 3: Cross multiply
   1,971.43x = 2,957.83 × 876.58
4. Step 4: Simplify right side
   1,971.43x = 2,592,765.04
5. Step 5: Solve for x
   x = 2,592,765.04/1,971.43
6. Step 6: Final answer
   x = 1,315.17