Finding the Fourth Proportional to 5,128.29, 7,692.72 and 1,618.38

Step by Step Solution

1. Step 1: Write the proportion equation
   5,128.29 : 7,692.72 = 1,618.38 : x
2. Step 2: Convert to fraction form
   5,128.29/7,692.72 = 1,618.38/x
3. Step 3: Cross multiply
   5,128.29x = 7,692.72 × 1,618.38
4. Step 4: Simplify right side
   5,128.29x = 12,449,744.19
5. Step 5: Solve for x
   x = 12,449,744.19/5,128.29
6. Step 6: Final answer
   x = 2,427.66