Finding the Fourth Proportional to 1,393.34, 1,922.23 and 869.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.34 : 1,922.23 = 869.06 : x
2. Step 2: Convert to fraction form
   1,393.34/1,922.23 = 869.06/x
3. Step 3: Cross multiply
   1,393.34x = 1,922.23 × 869.06
4. Step 4: Simplify right side
   1,393.34x = 1,670,539.10
5. Step 5: Solve for x
   x = 1,670,539.10/1,393.34
6. Step 6: Final answer
   x = 1,198.95