Finding the Fourth Proportional to 657,729.50, 907,667.52 and 355,923.50

Step by Step Solution

1. Step 1: Write the proportion equation
   657,729.50 : 907,667.52 = 355,923.50 : x
2. Step 2: Convert to fraction form
   657,729.50/907,667.52 = 355,923.50/x
3. Step 3: Cross multiply
   657,729.50x = 907,667.52 × 355,923.50
4. Step 4: Simplify right side
   657,729.50x = 323,060,200,554.72
5. Step 5: Solve for x
   x = 323,060,200,554.72/657,729.50
6. Step 6: Final answer
   x = 491,174.87