Finding the Fourth Proportional to 347,659.66, 479,404.72 and 257,203.98

Step by Step Solution

1. Step 1: Write the proportion equation
   347,659.66 : 479,404.72 = 257,203.98 : x
2. Step 2: Convert to fraction form
   347,659.66/479,404.72 = 257,203.98/x
3. Step 3: Cross multiply
   347,659.66x = 479,404.72 × 257,203.98
4. Step 4: Simplify right side
   347,659.66x = 123,304,801,020.78
5. Step 5: Solve for x
   x = 123,304,801,020.78/347,659.66
6. Step 6: Final answer
   x = 354,671.00