Finding the Fourth Proportional to 617,148.72, 851,743.98 and 345,231.72

Step by Step Solution

1. Step 1: Write the proportion equation
   617,148.72 : 851,743.98 = 345,231.72 : x
2. Step 2: Convert to fraction form
   617,148.72/851,743.98 = 345,231.72/x
3. Step 3: Cross multiply
   617,148.72x = 851,743.98 × 345,231.72
4. Step 4: Simplify right side
   617,148.72x = 294,049,039,215.05
5. Step 5: Solve for x
   x = 294,049,039,215.05/617,148.72
6. Step 6: Final answer
   x = 476,463.82