Finding the Fourth Proportional to 1,363.39, 1,881.40 and 773.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,363.39 : 1,881.40 = 773.80 : x
2. Step 2: Convert to fraction form
   1,363.39/1,881.40 = 773.80/x
3. Step 3: Cross multiply
   1,363.39x = 1,881.40 × 773.80
4. Step 4: Simplify right side
   1,363.39x = 1,455,827.32
5. Step 5: Solve for x
   x = 1,455,827.32/1,363.39
6. Step 6: Final answer
   x = 1,067.80