Finding the Fourth Proportional to 1,322.31, 1,981.91 and 541.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,322.31 : 1,981.91 = 541.83 : x
2. Step 2: Convert to fraction form
   1,322.31/1,981.91 = 541.83/x
3. Step 3: Cross multiply
   1,322.31x = 1,981.91 × 541.83
4. Step 4: Simplify right side
   1,322.31x = 1,073,855.59
5. Step 5: Solve for x
   x = 1,073,855.59/1,322.31
6. Step 6: Final answer
   x = 812.11