Finding the Fourth Proportional to 1,393.52, 1,923.56 and 869.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.52 : 1,923.56 = 869.36 : x
2. Step 2: Convert to fraction form
   1,393.52/1,923.56 = 869.36/x
3. Step 3: Cross multiply
   1,393.52x = 1,923.56 × 869.36
4. Step 4: Simplify right side
   1,393.52x = 1,672,266.12
5. Step 5: Solve for x
   x = 1,672,266.12/1,393.52
6. Step 6: Final answer
   x = 1,200.03