Finding the Fourth Proportional to 355,574.76, 490,738.20 and 202,667.88

Step by Step Solution

1. Step 1: Write the proportion equation
   355,574.76 : 490,738.20 = 202,667.88 : x
2. Step 2: Convert to fraction form
   355,574.76/490,738.20 = 202,667.88/x
3. Step 3: Cross multiply
   355,574.76x = 490,738.20 × 202,667.88
4. Step 4: Simplify right side
   355,574.76x = 99,456,870,629.02
5. Step 5: Solve for x
   x = 99,456,870,629.02/355,574.76
6. Step 6: Final answer
   x = 279,707.34