Finding the Fourth Proportional to 215,057, 296,778.66 and 120,849

Step by Step Solution

1. Step 1: Write the proportion equation
   215,057 : 296,778.66 = 120,849 : x
2. Step 2: Convert to fraction form
   215,057/296,778.66 = 120,849/x
3. Step 3: Cross multiply
   215,057x = 296,778.66 × 120,849
4. Step 4: Simplify right side
   215,057x = 35,865,404,282.34
5. Step 5: Solve for x
   x = 35,865,404,282.34/215,057
6. Step 6: Final answer
   x = 166,771.62