Finding the Fourth Proportional to 1,397,271.69, 1,928,245.59 and 777,085.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397,271.69 : 1,928,245.59 = 777,085.54 : x
2. Step 2: Convert to fraction form
   1,397,271.69/1,928,245.59 = 777,085.54/x
3. Step 3: Cross multiply
   1,397,271.69x = 1,928,245.59 × 777,085.54
4. Step 4: Simplify right side
   1,397,271.69x = 1,498,411,765,557.77
5. Step 5: Solve for x
   x = 1,498,411,765,557.77/1,397,271.69
6. Step 6: Final answer
   x = 1,072,383.97