Finding the Fourth Proportional to 1,407.34, 1,942.14 and 818.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.34 : 1,942.14 = 818.22 : x
2. Step 2: Convert to fraction form
   1,407.34/1,942.14 = 818.22/x
3. Step 3: Cross multiply
   1,407.34x = 1,942.14 × 818.22
4. Step 4: Simplify right side
   1,407.34x = 1,589,097.79
5. Step 5: Solve for x
   x = 1,589,097.79/1,407.34
6. Step 6: Final answer
   x = 1,129.15