Finding the Fourth Proportional to 1,122,151.86, 1,683,447.39 and 412,185.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,122,151.86 : 1,683,447.39 = 412,185.42 : x
2. Step 2: Convert to fraction form
   1,122,151.86/1,683,447.39 = 412,185.42/x
3. Step 3: Cross multiply
   1,122,151.86x = 1,683,447.39 × 412,185.42
4. Step 4: Simplify right side
   1,122,151.86x = 693,892,469,495.05
5. Step 5: Solve for x
   x = 693,892,469,495.05/1,122,151.86
6. Step 6: Final answer
   x = 618,358.79