Finding the Fourth Proportional to 646,066.42, 891,562.72 and 359,586.60

Step by Step Solution

1. Step 1: Write the proportion equation
   646,066.42 : 891,562.72 = 359,586.60 : x
2. Step 2: Convert to fraction form
   646,066.42/891,562.72 = 359,586.60/x
3. Step 3: Cross multiply
   646,066.42x = 891,562.72 × 359,586.60
4. Step 4: Simplify right side
   646,066.42x = 320,594,007,171.55
5. Step 5: Solve for x
   x = 320,594,007,171.55/646,066.42
6. Step 6: Final answer
   x = 496,224.53