Finding the Fourth Proportional to 120,316.09, 180,651.56 and 67,112.02

Step by Step Solution

1. Step 1: Write the proportion equation
   120,316.09 : 180,651.56 = 67,112.02 : x
2. Step 2: Convert to fraction form
   120,316.09/180,651.56 = 67,112.02/x
3. Step 3: Cross multiply
   120,316.09x = 180,651.56 × 67,112.02
4. Step 4: Simplify right side
   120,316.09x = 12,123,890,998.01
5. Step 5: Solve for x
   x = 12,123,890,998.01/120,316.09
6. Step 6: Final answer
   x = 100,766.99