Finding the Fourth Proportional to 656,150.86, 905,488.18 and 354,344.86

Step by Step Solution

1. Step 1: Write the proportion equation
   656,150.86 : 905,488.18 = 354,344.86 : x
2. Step 2: Convert to fraction form
   656,150.86/905,488.18 = 354,344.86/x
3. Step 3: Cross multiply
   656,150.86x = 905,488.18 × 354,344.86
4. Step 4: Simplify right side
   656,150.86x = 320,855,076,074.59
5. Step 5: Solve for x
   x = 320,855,076,074.59/656,150.86
6. Step 6: Final answer
   x = 488,995.90