Finding the Fourth Proportional to 2,431.76, 3,648.12 and 892.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,431.76 : 3,648.12 = 892.88 : x
2. Step 2: Convert to fraction form
   2,431.76/3,648.12 = 892.88/x
3. Step 3: Cross multiply
   2,431.76x = 3,648.12 × 892.88
4. Step 4: Simplify right side
   2,431.76x = 3,257,333.39
5. Step 5: Solve for x
   x = 3,257,333.39/2,431.76
6. Step 6: Final answer
   x = 1,339.50