Finding the Fourth Proportional to 1,363.20, 1,881.29 and 773.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,363.20 : 1,881.29 = 773.72 : x
2. Step 2: Convert to fraction form
   1,363.20/1,881.29 = 773.72/x
3. Step 3: Cross multiply
   1,363.20x = 1,881.29 × 773.72
4. Step 4: Simplify right side
   1,363.20x = 1,455,591.28
5. Step 5: Solve for x
   x = 1,455,591.28/1,363.20
6. Step 6: Final answer
   x = 1,067.78