Finding the Fourth Proportional to 123,771.70, 185,627.78 and 57,147.78

Step by Step Solution

1. Step 1: Write the proportion equation
   123,771.70 : 185,627.78 = 57,147.78 : x
2. Step 2: Convert to fraction form
   123,771.70/185,627.78 = 57,147.78/x
3. Step 3: Cross multiply
   123,771.70x = 185,627.78 × 57,147.78
4. Step 4: Simplify right side
   123,771.70x = 10,608,216,479.45
5. Step 5: Solve for x
   x = 10,608,216,479.45/123,771.70
6. Step 6: Final answer
   x = 85,707.93