Finding the Fourth Proportional to 745,410.45, 1,028,662.06 and 405,877.89

Step by Step Solution

1. Step 1: Write the proportion equation
   745,410.45 : 1,028,662.06 = 405,877.89 : x
2. Step 2: Convert to fraction form
   745,410.45/1,028,662.06 = 405,877.89/x
3. Step 3: Cross multiply
   745,410.45x = 1,028,662.06 × 405,877.89
4. Step 4: Simplify right side
   745,410.45x = 417,511,189,514.86
5. Step 5: Solve for x
   x = 417,511,189,514.86/745,410.45
6. Step 6: Final answer
   x = 560,109.12