Finding the Fourth Proportional to 1,382.28, 1,907.46 and 761.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.28 : 1,907.46 = 761.28 : x
2. Step 2: Convert to fraction form
   1,382.28/1,907.46 = 761.28/x
3. Step 3: Cross multiply
   1,382.28x = 1,907.46 × 761.28
4. Step 4: Simplify right side
   1,382.28x = 1,452,111.15
5. Step 5: Solve for x
   x = 1,452,111.15/1,382.28
6. Step 6: Final answer
   x = 1,050.52