Finding the Fourth Proportional to 470,738.72, 648,995.28 and 389,868.32

Step by Step Solution

1. Step 1: Write the proportion equation
   470,738.72 : 648,995.28 = 389,868.32 : x
2. Step 2: Convert to fraction form
   470,738.72/648,995.28 = 389,868.32/x
3. Step 3: Cross multiply
   470,738.72x = 648,995.28 × 389,868.32
4. Step 4: Simplify right side
   470,738.72x = 253,022,699,501.53
5. Step 5: Solve for x
   x = 253,022,699,501.53/470,738.72
6. Step 6: Final answer
   x = 537,501.35