Finding the Fourth Proportional to 120,500.78, 166,272.24 and 69,515.42

Step by Step Solution

1. Step 1: Write the proportion equation
   120,500.78 : 166,272.24 = 69,515.42 : x
2. Step 2: Convert to fraction form
   120,500.78/166,272.24 = 69,515.42/x
3. Step 3: Cross multiply
   120,500.78x = 166,272.24 × 69,515.42
4. Step 4: Simplify right side
   120,500.78x = 11,558,484,597.94
5. Step 5: Solve for x
   x = 11,558,484,597.94/120,500.78
6. Step 6: Final answer
   x = 95,920.41