Finding the Fourth Proportional to 1,407.84, 1,942.83 and 818.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.84 : 1,942.83 = 818.52 : x
2. Step 2: Convert to fraction form
   1,407.84/1,942.83 = 818.52/x
3. Step 3: Cross multiply
   1,407.84x = 1,942.83 × 818.52
4. Step 4: Simplify right side
   1,407.84x = 1,590,245.21
5. Step 5: Solve for x
   x = 1,590,245.21/1,407.84
6. Step 6: Final answer
   x = 1,129.56