Finding the Fourth Proportional to 1,363.21, 1,881.10 and 773.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,363.21 : 1,881.10 = 773.63 : x
2. Step 2: Convert to fraction form
   1,363.21/1,881.10 = 773.63/x
3. Step 3: Cross multiply
   1,363.21x = 1,881.10 × 773.63
4. Step 4: Simplify right side
   1,363.21x = 1,455,264.05
5. Step 5: Solve for x
   x = 1,455,264.05/1,363.21
6. Step 6: Final answer
   x = 1,067.53