Finding the Fourth Proportional to 745,171.34, 1,028,310.27 and 405,632.30

Step by Step Solution

1. Step 1: Write the proportion equation
   745,171.34 : 1,028,310.27 = 405,632.30 : x
2. Step 2: Convert to fraction form
   745,171.34/1,028,310.27 = 405,632.30/x
3. Step 3: Cross multiply
   745,171.34x = 1,028,310.27 × 405,632.30
4. Step 4: Simplify right side
   745,171.34x = 417,115,859,933.72
5. Step 5: Solve for x
   x = 417,115,859,933.72/745,171.34
6. Step 6: Final answer
   x = 559,758.32