Finding the Fourth Proportional to 1,400.33, 1,933.35 and 869.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,400.33 : 1,933.35 = 869.78 : x
2. Step 2: Convert to fraction form
   1,400.33/1,933.35 = 869.78/x
3. Step 3: Cross multiply
   1,400.33x = 1,933.35 × 869.78
4. Step 4: Simplify right side
   1,400.33x = 1,681,579.50
5. Step 5: Solve for x
   x = 1,681,579.50/1,400.33
6. Step 6: Final answer
   x = 1,200.85