Finding the Fourth Proportional to 1,262,078.28, 1,741,659.30 and 689,118.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,262,078.28 : 1,741,659.30 = 689,118.12 : x
2. Step 2: Convert to fraction form
   1,262,078.28/1,741,659.30 = 689,118.12/x
3. Step 3: Cross multiply
   1,262,078.28x = 1,741,659.30 × 689,118.12
4. Step 4: Simplify right side
   1,262,078.28x = 1,200,208,982,496.52
5. Step 5: Solve for x
   x = 1,200,208,982,496.52/1,262,078.28
6. Step 6: Final answer
   x = 950,978.24