Finding the Fourth Proportional to 1,109,271.39, 1,664,091.05 and 389,426.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109,271.39 : 1,664,091.05 = 389,426.28 : x
2. Step 2: Convert to fraction form
   1,109,271.39/1,664,091.05 = 389,426.28/x
3. Step 3: Cross multiply
   1,109,271.39x = 1,664,091.05 × 389,426.28
4. Step 4: Simplify right side
   1,109,271.39x = 648,040,787,182.79
5. Step 5: Solve for x
   x = 648,040,787,182.79/1,109,271.39
6. Step 6: Final answer
   x = 584,204.00