Finding the Fourth Proportional to 1,131,786.38, 1,561,857.71 and 641,848.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131,786.38 : 1,561,857.71 = 641,848.56 : x
2. Step 2: Convert to fraction form
   1,131,786.38/1,561,857.71 = 641,848.56/x
3. Step 3: Cross multiply
   1,131,786.38x = 1,561,857.71 × 641,848.56
4. Step 4: Simplify right side
   1,131,786.38x = 1,002,476,118,879.15
5. Step 5: Solve for x
   x = 1,002,476,118,879.15/1,131,786.38
6. Step 6: Final answer
   x = 885,746.76