Finding the Fourth Proportional to 428,409, 591,204.42 and 237,434.69

Step by Step Solution

1. Step 1: Write the proportion equation
   428,409 : 591,204.42 = 237,434.69 : x
2. Step 2: Convert to fraction form
   428,409/591,204.42 = 237,434.69/x
3. Step 3: Cross multiply
   428,409x = 591,204.42 × 237,434.69
4. Step 4: Simplify right side
   428,409x = 140,372,439,667.34
5. Step 5: Solve for x
   x = 140,372,439,667.34/428,409
6. Step 6: Final answer
   x = 327,659.88