Finding the Fourth Proportional to 1,222,137.83, 1,686,568.68 and 678,308.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222,137.83 : 1,686,568.68 = 678,308.82 : x
2. Step 2: Convert to fraction form
   1,222,137.83/1,686,568.68 = 678,308.82/x
3. Step 3: Cross multiply
   1,222,137.83x = 1,686,568.68 × 678,308.82
4. Step 4: Simplify right side
   1,222,137.83x = 1,144,014,411,179.76
5. Step 5: Solve for x
   x = 1,144,014,411,179.76/1,222,137.83
6. Step 6: Final answer
   x = 936,076.43