Finding the Fourth Proportional to 1,411.34, 2,113.32 and 862.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.34 : 2,113.32 = 862.76 : x
2. Step 2: Convert to fraction form
   1,411.34/2,113.32 = 862.76/x
3. Step 3: Cross multiply
   1,411.34x = 2,113.32 × 862.76
4. Step 4: Simplify right side
   1,411.34x = 1,823,287.96
5. Step 5: Solve for x
   x = 1,823,287.96/1,411.34
6. Step 6: Final answer
   x = 1,291.88