Finding the Fourth Proportional to 1,188,736.82, 1,640,456.81 and 679,450.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,188,736.82 : 1,640,456.81 = 679,450.13 : x
2. Step 2: Convert to fraction form
   1,188,736.82/1,640,456.81 = 679,450.13/x
3. Step 3: Cross multiply
   1,188,736.82x = 1,640,456.81 × 679,450.13
4. Step 4: Simplify right side
   1,188,736.82x = 1,114,608,592,813.89
5. Step 5: Solve for x
   x = 1,114,608,592,813.89/1,188,736.82
6. Step 6: Final answer
   x = 937,641.18