Finding the Fourth Proportional to 1,361.07, 1,878.31 and 763.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.07 : 1,878.31 = 763.54 : x
2. Step 2: Convert to fraction form
   1,361.07/1,878.31 = 763.54/x
3. Step 3: Cross multiply
   1,361.07x = 1,878.31 × 763.54
4. Step 4: Simplify right side
   1,361.07x = 1,434,164.82
5. Step 5: Solve for x
   x = 1,434,164.82/1,361.07
6. Step 6: Final answer
   x = 1,053.70