Finding the Fourth Proportional to 120,399.94, 180,595.86 and 57,250.72

Step by Step Solution

1. Step 1: Write the proportion equation
   120,399.94 : 180,595.86 = 57,250.72 : x
2. Step 2: Convert to fraction form
   120,399.94/180,595.86 = 57,250.72/x
3. Step 3: Cross multiply
   120,399.94x = 180,595.86 × 57,250.72
4. Step 4: Simplify right side
   120,399.94x = 10,339,243,014.02
5. Step 5: Solve for x
   x = 10,339,243,014.02/120,399.94
6. Step 6: Final answer
   x = 85,874.15