Finding the Fourth Proportional to 2,120,007.20, 3,178,460.43 and 679,870.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,120,007.20 : 3,178,460.43 = 679,870.84 : x
2. Step 2: Convert to fraction form
   2,120,007.20/3,178,460.43 = 679,870.84/x
3. Step 3: Cross multiply
   2,120,007.20x = 3,178,460.43 × 679,870.84
4. Step 4: Simplify right side
   2,120,007.20x = 2,160,942,562,376.46
5. Step 5: Solve for x
   x = 2,160,942,562,376.46/2,120,007.20
6. Step 6: Final answer
   x = 1,019,309.07