Finding the Fourth Proportional to 449,803, 620,326.37 and 373,200.82

Step by Step Solution

1. Step 1: Write the proportion equation
   449,803 : 620,326.37 = 373,200.82 : x
2. Step 2: Convert to fraction form
   449,803/620,326.37 = 373,200.82/x
3. Step 3: Cross multiply
   449,803x = 620,326.37 × 373,200.82
4. Step 4: Simplify right side
   449,803x = 231,506,309,951.62
5. Step 5: Solve for x
   x = 231,506,309,951.62/449,803
6. Step 6: Final answer
   x = 514,683.78