Finding the Fourth Proportional to 1,185,320.99, 1,635,742.89 and 641,456.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185,320.99 : 1,635,742.89 = 641,456.79 : x
2. Step 2: Convert to fraction form
   1,185,320.99/1,635,742.89 = 641,456.79/x
3. Step 3: Cross multiply
   1,185,320.99x = 1,635,742.89 × 641,456.79
4. Step 4: Simplify right side
   1,185,320.99x = 1,049,258,377,350.69
5. Step 5: Solve for x
   x = 1,049,258,377,350.69/1,185,320.99
6. Step 6: Final answer
   x = 885,210.32