Finding the Fourth Proportional to 120,316.10, 180,651.56 and 67,112.03

Step by Step Solution

1. Step 1: Write the proportion equation
   120,316.10 : 180,651.56 = 67,112.03 : x
2. Step 2: Convert to fraction form
   120,316.10/180,651.56 = 67,112.03/x
3. Step 3: Cross multiply
   120,316.10x = 180,651.56 × 67,112.03
4. Step 4: Simplify right side
   120,316.10x = 12,123,892,914.27
5. Step 5: Solve for x
   x = 12,123,892,914.27/120,316.10
6. Step 6: Final answer
   x = 100,767.00