Finding the Fourth Proportional to 1,436.16, 2,151.48 and 818.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.16 : 2,151.48 = 818.88 : x
2. Step 2: Convert to fraction form
   1,436.16/2,151.48 = 818.88/x
3. Step 3: Cross multiply
   1,436.16x = 2,151.48 × 818.88
4. Step 4: Simplify right side
   1,436.16x = 1,761,803.94
5. Step 5: Solve for x
   x = 1,761,803.94/1,436.16
6. Step 6: Final answer
   x = 1,226.75