Finding the Fourth Proportional to 123,297.06, 185,004.09 and 85,404.60

Step by Step Solution

1. Step 1: Write the proportion equation
   123,297.06 : 185,004.09 = 85,404.60 : x
2. Step 2: Convert to fraction form
   123,297.06/185,004.09 = 85,404.60/x
3. Step 3: Cross multiply
   123,297.06x = 185,004.09 × 85,404.60
4. Step 4: Simplify right side
   123,297.06x = 15,800,200,304.81
5. Step 5: Solve for x
   x = 15,800,200,304.81/123,297.06
6. Step 6: Final answer
   x = 128,147.42