Finding the Fourth Proportional to 727,443.72, 1,003,903.62 and 405,153.96

Step by Step Solution

1. Step 1: Write the proportion equation
   727,443.72 : 1,003,903.62 = 405,153.96 : x
2. Step 2: Convert to fraction form
   727,443.72/1,003,903.62 = 405,153.96/x
3. Step 3: Cross multiply
   727,443.72x = 1,003,903.62 × 405,153.96
4. Step 4: Simplify right side
   727,443.72x = 406,735,527,101.34
5. Step 5: Solve for x
   x = 406,735,527,101.34/727,443.72
6. Step 6: Final answer
   x = 559,129.89