Finding the Fourth Proportional to 1,322.39, 1,982.85 and 542.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,322.39 : 1,982.85 = 542.18 : x
2. Step 2: Convert to fraction form
   1,322.39/1,982.85 = 542.18/x
3. Step 3: Cross multiply
   1,322.39x = 1,982.85 × 542.18
4. Step 4: Simplify right side
   1,322.39x = 1,075,061.61
5. Step 5: Solve for x
   x = 1,075,061.61/1,322.39
6. Step 6: Final answer
   x = 812.97