Finding the Fourth Proportional to 1,208,711.34, 1,667,986.83 and 664,847.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,208,711.34 : 1,667,986.83 = 664,847.10 : x
2. Step 2: Convert to fraction form
   1,208,711.34/1,667,986.83 = 664,847.10/x
3. Step 3: Cross multiply
   1,208,711.34x = 1,667,986.83 × 664,847.10
4. Step 4: Simplify right side
   1,208,711.34x = 1,108,956,206,763.69
5. Step 5: Solve for x
   x = 1,108,956,206,763.69/1,208,711.34
6. Step 6: Final answer
   x = 917,469.85