Finding the Fourth Proportional to 2,528.81, 3,792.89 and 885.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,528.81 : 3,792.89 = 885.21 : x
2. Step 2: Convert to fraction form
   2,528.81/3,792.89 = 885.21/x
3. Step 3: Cross multiply
   2,528.81x = 3,792.89 × 885.21
4. Step 4: Simplify right side
   2,528.81x = 3,357,499.73
5. Step 5: Solve for x
   x = 3,357,499.73/2,528.81
6. Step 6: Final answer
   x = 1,327.70