Finding the Fourth Proportional to 2,945,105.78, 4,417,664.82 and 815,196.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,945,105.78 : 4,417,664.82 = 815,196.05 : x
2. Step 2: Convert to fraction form
   2,945,105.78/4,417,664.82 = 815,196.05/x
3. Step 3: Cross multiply
   2,945,105.78x = 4,417,664.82 × 815,196.05
4. Step 4: Simplify right side
   2,945,105.78x = 3,601,262,907,494.37
5. Step 5: Solve for x
   x = 3,601,262,907,494.37/2,945,105.78
6. Step 6: Final answer
   x = 1,222,795.78