Finding the Fourth Proportional to 2,541.32, 3,812.58 and 809.95

Step by Step Solution

1. Step 1: Write the proportion equation
   2,541.32 : 3,812.58 = 809.95 : x
2. Step 2: Convert to fraction form
   2,541.32/3,812.58 = 809.95/x
3. Step 3: Cross multiply
   2,541.32x = 3,812.58 × 809.95
4. Step 4: Simplify right side
   2,541.32x = 3,087,999.17
5. Step 5: Solve for x
   x = 3,087,999.17/2,541.32
6. Step 6: Final answer
   x = 1,215.12