Finding the Fourth Proportional to 1,407.27, 1,942.20 and 818.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.27 : 1,942.20 = 818.01 : x
2. Step 2: Convert to fraction form
   1,407.27/1,942.20 = 818.01/x
3. Step 3: Cross multiply
   1,407.27x = 1,942.20 × 818.01
4. Step 4: Simplify right side
   1,407.27x = 1,588,739.02
5. Step 5: Solve for x
   x = 1,588,739.02/1,407.27
6. Step 6: Final answer
   x = 1,128.95