Finding the Fourth Proportional to 120,587.76, 180,003.38 and 111,693.96

Step by Step Solution

1. Step 1: Write the proportion equation
   120,587.76 : 180,003.38 = 111,693.96 : x
2. Step 2: Convert to fraction form
   120,587.76/180,003.38 = 111,693.96/x
3. Step 3: Cross multiply
   120,587.76x = 180,003.38 × 111,693.96
4. Step 4: Simplify right side
   120,587.76x = 20,105,290,604.82
5. Step 5: Solve for x
   x = 20,105,290,604.82/120,587.76
6. Step 6: Final answer
   x = 166,727.46