Finding the Fourth Proportional to 727,401.83, 1,003,845.64 and 405,111.88

Step by Step Solution

1. Step 1: Write the proportion equation
   727,401.83 : 1,003,845.64 = 405,111.88 : x
2. Step 2: Convert to fraction form
   727,401.83/1,003,845.64 = 405,111.88/x
3. Step 3: Cross multiply
   727,401.83x = 1,003,845.64 × 405,111.88
4. Step 4: Simplify right side
   727,401.83x = 406,669,789,430.98
5. Step 5: Solve for x
   x = 406,669,789,430.98/727,401.83
6. Step 6: Final answer
   x = 559,071.72