Finding the Fourth Proportional to 120,212.72, 165,913.32 and 69,940.88

Step by Step Solution

1. Step 1: Write the proportion equation
   120,212.72 : 165,913.32 = 69,940.88 : x
2. Step 2: Convert to fraction form
   120,212.72/165,913.32 = 69,940.88/x
3. Step 3: Cross multiply
   120,212.72x = 165,913.32 × 69,940.88
4. Step 4: Simplify right side
   120,212.72x = 11,604,123,604.52
5. Step 5: Solve for x
   x = 11,604,123,604.52/120,212.72
6. Step 6: Final answer
   x = 96,529.91