Finding the Fourth Proportional to 1,078,633.67, 1,618,568.71 and 438,819.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078,633.67 : 1,618,568.71 = 438,819.33 : x
2. Step 2: Convert to fraction form
   1,078,633.67/1,618,568.71 = 438,819.33/x
3. Step 3: Cross multiply
   1,078,633.67x = 1,618,568.71 × 438,819.33
4. Step 4: Simplify right side
   1,078,633.67x = 710,259,236,881.16
5. Step 5: Solve for x
   x = 710,259,236,881.16/1,078,633.67
6. Step 6: Final answer
   x = 658,480.50