Finding the Fourth Proportional to 123,765.42, 185,618.39 and 57,141.57

Step by Step Solution

1. Step 1: Write the proportion equation
   123,765.42 : 185,618.39 = 57,141.57 : x
2. Step 2: Convert to fraction form
   123,765.42/185,618.39 = 57,141.57/x
3. Step 3: Cross multiply
   123,765.42x = 185,618.39 × 57,141.57
4. Step 4: Simplify right side
   123,765.42x = 10,606,526,225.47
5. Step 5: Solve for x
   x = 10,606,526,225.47/123,765.42
6. Step 6: Final answer
   x = 85,698.62