Finding the Fourth Proportional to 1,361.35, 1,878.60 and 763.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.35 : 1,878.60 = 763.77 : x
2. Step 2: Convert to fraction form
   1,361.35/1,878.60 = 763.77/x
3. Step 3: Cross multiply
   1,361.35x = 1,878.60 × 763.77
4. Step 4: Simplify right side
   1,361.35x = 1,434,814.50
5. Step 5: Solve for x
   x = 1,434,814.50/1,361.35
6. Step 6: Final answer
   x = 1,053.96