Finding the Fourth Proportional to 120,400.84, 180,429.18 and 67,699.72

Step by Step Solution

1. Step 1: Write the proportion equation
   120,400.84 : 180,429.18 = 67,699.72 : x
2. Step 2: Convert to fraction form
   120,400.84/180,429.18 = 67,699.72/x
3. Step 3: Cross multiply
   120,400.84x = 180,429.18 × 67,699.72
4. Step 4: Simplify right side
   120,400.84x = 12,215,004,965.83
5. Step 5: Solve for x
   x = 12,215,004,965.83/120,400.84
6. Step 6: Final answer
   x = 101,452.82