Finding the Fourth Proportional to 656,931.30, 985,429.35 and 342,003.30

Step by Step Solution

1. Step 1: Write the proportion equation
   656,931.30 : 985,429.35 = 342,003.30 : x
2. Step 2: Convert to fraction form
   656,931.30/985,429.35 = 342,003.30/x
3. Step 3: Cross multiply
   656,931.30x = 985,429.35 × 342,003.30
4. Step 4: Simplify right side
   656,931.30x = 337,020,089,616.86
5. Step 5: Solve for x
   x = 337,020,089,616.86/656,931.30
6. Step 6: Final answer
   x = 513,021.82