Finding the Fourth Proportional to 1,282.73, 1,923.01 and 542.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,282.73 : 1,923.01 = 542.31 : x
2. Step 2: Convert to fraction form
   1,282.73/1,923.01 = 542.31/x
3. Step 3: Cross multiply
   1,282.73x = 1,923.01 × 542.31
4. Step 4: Simplify right side
   1,282.73x = 1,042,861.69
5. Step 5: Solve for x
   x = 1,042,861.69/1,282.73
6. Step 6: Final answer
   x = 813.00