Finding the Fourth Proportional to 120,078.58, 180,111.38 and 60,912.71

Step by Step Solution

1. Step 1: Write the proportion equation
   120,078.58 : 180,111.38 = 60,912.71 : x
2. Step 2: Convert to fraction form
   120,078.58/180,111.38 = 60,912.71/x
3. Step 3: Cross multiply
   120,078.58x = 180,111.38 × 60,912.71
4. Step 4: Simplify right side
   120,078.58x = 10,971,072,403.35
5. Step 5: Solve for x
   x = 10,971,072,403.35/120,078.58
6. Step 6: Final answer
   x = 91,365.77