Finding the Fourth Proportional to 323,620.10, 485,084.55 and 123,863.30

Step by Step Solution

1. Step 1: Write the proportion equation
   323,620.10 : 485,084.55 = 123,863.30 : x
2. Step 2: Convert to fraction form
   323,620.10/485,084.55 = 123,863.30/x
3. Step 3: Cross multiply
   323,620.10x = 485,084.55 × 123,863.30
4. Step 4: Simplify right side
   323,620.10x = 60,084,173,142.02
5. Step 5: Solve for x
   x = 60,084,173,142.02/323,620.10
6. Step 6: Final answer
   x = 185,662.67