Finding the Fourth Proportional to 646,200.72, 891,786.24 and 374,280.48

Step by Step Solution

1. Step 1: Write the proportion equation
   646,200.72 : 891,786.24 = 374,280.48 : x
2. Step 2: Convert to fraction form
   646,200.72/891,786.24 = 374,280.48/x
3. Step 3: Cross multiply
   646,200.72x = 891,786.24 × 374,280.48
4. Step 4: Simplify right side
   646,200.72x = 333,778,181,964.60
5. Step 5: Solve for x
   x = 333,778,181,964.60/646,200.72
6. Step 6: Final answer
   x = 516,524.00