Finding the Fourth Proportional to 120,315.10, 180,650.06 and 67,111.03

Step by Step Solution

1. Step 1: Write the proportion equation
   120,315.10 : 180,650.06 = 67,111.03 : x
2. Step 2: Convert to fraction form
   120,315.10/180,650.06 = 67,111.03/x
3. Step 3: Cross multiply
   120,315.10x = 180,650.06 × 67,111.03
4. Step 4: Simplify right side
   120,315.10x = 12,123,610,692.91
5. Step 5: Solve for x
   x = 12,123,610,692.91/120,315.10
6. Step 6: Final answer
   x = 100,765.50