Finding the Fourth Proportional to 120,158.72, 180,063.12 and 57,756.32

Step by Step Solution

1. Step 1: Write the proportion equation
   120,158.72 : 180,063.12 = 57,756.32 : x
2. Step 2: Convert to fraction form
   120,158.72/180,063.12 = 57,756.32/x
3. Step 3: Cross multiply
   120,158.72x = 180,063.12 × 57,756.32
4. Step 4: Simplify right side
   120,158.72x = 10,399,783,178.92
5. Step 5: Solve for x
   x = 10,399,783,178.92/120,158.72
6. Step 6: Final answer
   x = 86,550.38