Finding the Fourth Proportional to 1,381.34, 1,906.17 and 822.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.34 : 1,906.17 = 822.03 : x
2. Step 2: Convert to fraction form
   1,381.34/1,906.17 = 822.03/x
3. Step 3: Cross multiply
   1,381.34x = 1,906.17 × 822.03
4. Step 4: Simplify right side
   1,381.34x = 1,566,928.93
5. Step 5: Solve for x
   x = 1,566,928.93/1,381.34
6. Step 6: Final answer
   x = 1,134.36