Finding the Fourth Proportional to 123,923.78, 185,636.19 and 57,272.12

Step by Step Solution

1. Step 1: Write the proportion equation
   123,923.78 : 185,636.19 = 57,272.12 : x
2. Step 2: Convert to fraction form
   123,923.78/185,636.19 = 57,272.12/x
3. Step 3: Cross multiply
   123,923.78x = 185,636.19 × 57,272.12
4. Step 4: Simplify right side
   123,923.78x = 10,631,778,150.02
5. Step 5: Solve for x
   x = 10,631,778,150.02/123,923.78
6. Step 6: Final answer
   x = 85,792.88