Finding the Fourth Proportional to 1,422.06, 2,131.61 and 544.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.06 : 2,131.61 = 544.43 : x
2. Step 2: Convert to fraction form
   1,422.06/2,131.61 = 544.43/x
3. Step 3: Cross multiply
   1,422.06x = 2,131.61 × 544.43
4. Step 4: Simplify right side
   1,422.06x = 1,160,499.05
5. Step 5: Solve for x
   x = 1,160,499.05/1,422.06
6. Step 6: Final answer
   x = 816.07