Finding the Fourth Proportional to 1,402.94, 2,103.72 and 818.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.94 : 2,103.72 = 818.16 : x
2. Step 2: Convert to fraction form
   1,402.94/2,103.72 = 818.16/x
3. Step 3: Cross multiply
   1,402.94x = 2,103.72 × 818.16
4. Step 4: Simplify right side
   1,402.94x = 1,721,179.56
5. Step 5: Solve for x
   x = 1,721,179.56/1,402.94
6. Step 6: Final answer
   x = 1,226.84