Finding the Fourth Proportional to 745,300.60, 1,028,483.94 and 405,768.04

Step by Step Solution

1. Step 1: Write the proportion equation
   745,300.60 : 1,028,483.94 = 405,768.04 : x
2. Step 2: Convert to fraction form
   745,300.60/1,028,483.94 = 405,768.04/x
3. Step 3: Cross multiply
   745,300.60x = 1,028,483.94 × 405,768.04
4. Step 4: Simplify right side
   745,300.60x = 417,325,912,505.28
5. Step 5: Solve for x
   x = 417,325,912,505.28/745,300.60
6. Step 6: Final answer
   x = 559,943.08