Finding the Fourth Proportional to 1,222,377.35, 1,686,796.31 and 678,470.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222,377.35 : 1,686,796.31 = 678,470.33 : x
2. Step 2: Convert to fraction form
   1,222,377.35/1,686,796.31 = 678,470.33/x
3. Step 3: Cross multiply
   1,222,377.35x = 1,686,796.31 × 678,470.33
4. Step 4: Simplify right side
   1,222,377.35x = 1,144,441,245,513.42
5. Step 5: Solve for x
   x = 1,144,441,245,513.42/1,222,377.35
6. Step 6: Final answer
   x = 936,242.19