Finding the Fourth Proportional to 443,224.52, 660,620.51 and 417,999.50

Step by Step Solution

1. Step 1: Write the proportion equation
   443,224.52 : 660,620.51 = 417,999.50 : x
2. Step 2: Convert to fraction form
   443,224.52/660,620.51 = 417,999.50/x
3. Step 3: Cross multiply
   443,224.52x = 660,620.51 × 417,999.50
4. Step 4: Simplify right side
   443,224.52x = 276,139,040,611.64
5. Step 5: Solve for x
   x = 276,139,040,611.64/443,224.52
6. Step 6: Final answer
   x = 623,022.94