Finding the Fourth Proportional to 1,405.69, 2,103.37 and 876.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405.69 : 2,103.37 = 876.76 : x
2. Step 2: Convert to fraction form
   1,405.69/2,103.37 = 876.76/x
3. Step 3: Cross multiply
   1,405.69x = 2,103.37 × 876.76
4. Step 4: Simplify right side
   1,405.69x = 1,844,143.23
5. Step 5: Solve for x
   x = 1,844,143.23/1,405.69
6. Step 6: Final answer
   x = 1,311.92