Finding the Fourth Proportional to 1,222,131.82, 1,686,560.41 and 678,302.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222,131.82 : 1,686,560.41 = 678,302.83 : x
2. Step 2: Convert to fraction form
   1,222,131.82/1,686,560.41 = 678,302.83/x
3. Step 3: Cross multiply
   1,222,131.82x = 1,686,560.41 × 678,302.83
4. Step 4: Simplify right side
   1,222,131.82x = 1,143,998,704,860.76
5. Step 5: Solve for x
   x = 1,143,998,704,860.76/1,222,131.82
6. Step 6: Final answer
   x = 936,068.18