Finding the Fourth Proportional to 728,808.72, 1,005,757.56 and 406,510.52

Step by Step Solution

1. Step 1: Write the proportion equation
   728,808.72 : 1,005,757.56 = 406,510.52 : x
2. Step 2: Convert to fraction form
   728,808.72/1,005,757.56 = 406,510.52/x
3. Step 3: Cross multiply
   728,808.72x = 1,005,757.56 × 406,510.52
4. Step 4: Simplify right side
   728,808.72x = 408,851,028,709.53
5. Step 5: Solve for x
   x = 408,851,028,709.53/728,808.72
6. Step 6: Final answer
   x = 560,985.37