Finding the Fourth Proportional to 1,380.20, 1,904.69 and 750.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.20 : 1,904.69 = 750.73 : x
2. Step 2: Convert to fraction form
   1,380.20/1,904.69 = 750.73/x
3. Step 3: Cross multiply
   1,380.20x = 1,904.69 × 750.73
4. Step 4: Simplify right side
   1,380.20x = 1,429,907.92
5. Step 5: Solve for x
   x = 1,429,907.92/1,380.20
6. Step 6: Final answer
   x = 1,036.02