Finding the Fourth Proportional to 282,383.72, 389,692.27 and 155,062.05

Step by Step Solution

1. Step 1: Write the proportion equation
   282,383.72 : 389,692.27 = 155,062.05 : x
2. Step 2: Convert to fraction form
   282,383.72/389,692.27 = 155,062.05/x
3. Step 3: Cross multiply
   282,383.72x = 389,692.27 × 155,062.05
4. Step 4: Simplify right side
   282,383.72x = 60,426,480,115.61
5. Step 5: Solve for x
   x = 60,426,480,115.61/282,383.72
6. Step 6: Final answer
   x = 213,987.12