Finding the Fourth Proportional to 726,978.36, 1,003,723.92 and 455,156.12

Step by Step Solution

1. Step 1: Write the proportion equation
   726,978.36 : 1,003,723.92 = 455,156.12 : x
2. Step 2: Convert to fraction form
   726,978.36/1,003,723.92 = 455,156.12/x
3. Step 3: Cross multiply
   726,978.36x = 1,003,723.92 × 455,156.12
4. Step 4: Simplify right side
   726,978.36x = 456,851,084,978.39
5. Step 5: Solve for x
   x = 456,851,084,978.39/726,978.36
6. Step 6: Final answer
   x = 628,424.60