Finding the Fourth Proportional to 412,667.19, 618,203.75 and 304,405.83

Step by Step Solution

1. Step 1: Write the proportion equation
   412,667.19 : 618,203.75 = 304,405.83 : x
2. Step 2: Convert to fraction form
   412,667.19/618,203.75 = 304,405.83/x
3. Step 3: Cross multiply
   412,667.19x = 618,203.75 × 304,405.83
4. Step 4: Simplify right side
   412,667.19x = 188,184,824,105.83
5. Step 5: Solve for x
   x = 188,184,824,105.83/412,667.19
6. Step 6: Final answer
   x = 456,020.80