Finding the Fourth Proportional to 215,921.94, 297,972.71 and 120,434.82

Step by Step Solution

1. Step 1: Write the proportion equation
   215,921.94 : 297,972.71 = 120,434.82 : x
2. Step 2: Convert to fraction form
   215,921.94/297,972.71 = 120,434.82/x
3. Step 3: Cross multiply
   215,921.94x = 297,972.71 × 120,434.82
4. Step 4: Simplify right side
   215,921.94x = 35,886,289,091.59
5. Step 5: Solve for x
   x = 35,886,289,091.59/215,921.94
6. Step 6: Final answer
   x = 166,200.29