Finding the Fourth Proportional to 1,122,081.55, 1,683,288.42 and 412,054.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,122,081.55 : 1,683,288.42 = 412,054.23 : x
2. Step 2: Convert to fraction form
   1,122,081.55/1,683,288.42 = 412,054.23/x
3. Step 3: Cross multiply
   1,122,081.55x = 1,683,288.42 × 412,054.23
4. Step 4: Simplify right side
   1,122,081.55x = 693,606,113,771.02
5. Step 5: Solve for x
   x = 693,606,113,771.02/1,122,081.55
6. Step 6: Final answer
   x = 618,142.34