Finding the Fourth Proportional to 1,380.06, 2,067.48 and 763.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.06 : 2,067.48 = 763.29 : x
2. Step 2: Convert to fraction form
   1,380.06/2,067.48 = 763.29/x
3. Step 3: Cross multiply
   1,380.06x = 2,067.48 × 763.29
4. Step 4: Simplify right side
   1,380.06x = 1,578,086.81
5. Step 5: Solve for x
   x = 1,578,086.81/1,380.06
6. Step 6: Final answer
   x = 1,143.49