Finding the Fourth Proportional to 1,390,758.36, 1,919,087.82 and 778,826.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,390,758.36 : 1,919,087.82 = 778,826.04 : x
2. Step 2: Convert to fraction form
   1,390,758.36/1,919,087.82 = 778,826.04/x
3. Step 3: Cross multiply
   1,390,758.36x = 1,919,087.82 × 778,826.04
4. Step 4: Simplify right side
   1,390,758.36x = 1,494,635,567,262.83
5. Step 5: Solve for x
   x = 1,494,635,567,262.83/1,390,758.36
6. Step 6: Final answer
   x = 1,074,691.05