Finding the Fourth Proportional to 1,333.95, 1,998.38 and 812.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,333.95 : 1,998.38 = 812.42 : x
2. Step 2: Convert to fraction form
   1,333.95/1,998.38 = 812.42/x
3. Step 3: Cross multiply
   1,333.95x = 1,998.38 × 812.42
4. Step 4: Simplify right side
   1,333.95x = 1,623,509.83
5. Step 5: Solve for x
   x = 1,623,509.83/1,333.95
6. Step 6: Final answer
   x = 1,217.07