Finding the Fourth Proportional to 404,538.79, 606,928.92 and 120,238.78

Step by Step Solution

1. Step 1: Write the proportion equation
   404,538.79 : 606,928.92 = 120,238.78 : x
2. Step 2: Convert to fraction form
   404,538.79/606,928.92 = 120,238.78/x
3. Step 3: Cross multiply
   404,538.79x = 606,928.92 × 120,238.78
4. Step 4: Simplify right side
   404,538.79x = 72,976,392,887.52
5. Step 5: Solve for x
   x = 72,976,392,887.52/404,538.79
6. Step 6: Final answer
   x = 180,394.06