Finding the Fourth Proportional to 5,428.80, 8,151.30 and 3,792.60

Step by Step Solution

1. Step 1: Write the proportion equation
   5,428.80 : 8,151.30 = 3,792.60 : x
2. Step 2: Convert to fraction form
   5,428.80/8,151.30 = 3,792.60/x
3. Step 3: Cross multiply
   5,428.80x = 8,151.30 × 3,792.60
4. Step 4: Simplify right side
   5,428.80x = 30,914,620.38
5. Step 5: Solve for x
   x = 30,914,620.38/5,428.80
6. Step 6: Final answer
   x = 5,694.56