Finding the Fourth Proportional to 1,208,404.27, 1,667,640.70 and 664,582.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,208,404.27 : 1,667,640.70 = 664,582.12 : x
2. Step 2: Convert to fraction form
   1,208,404.27/1,667,640.70 = 664,582.12/x
3. Step 3: Cross multiply
   1,208,404.27x = 1,667,640.70 × 664,582.12
4. Step 4: Simplify right side
   1,208,404.27x = 1,108,284,191,804.28
5. Step 5: Solve for x
   x = 1,108,284,191,804.28/1,208,404.27
6. Step 6: Final answer
   x = 917,146.87