Finding the Fourth Proportional to 1,401.32, 1,933.83 and 780.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.32 : 1,933.83 = 780.32 : x
2. Step 2: Convert to fraction form
   1,401.32/1,933.83 = 780.32/x
3. Step 3: Cross multiply
   1,401.32x = 1,933.83 × 780.32
4. Step 4: Simplify right side
   1,401.32x = 1,509,006.23
5. Step 5: Solve for x
   x = 1,509,006.23/1,401.32
6. Step 6: Final answer
   x = 1,076.85