Finding the Fourth Proportional to 1,361.56, 1,878.93 and 764.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.56 : 1,878.93 = 764.07 : x
2. Step 2: Convert to fraction form
   1,361.56/1,878.93 = 764.07/x
3. Step 3: Cross multiply
   1,361.56x = 1,878.93 × 764.07
4. Step 4: Simplify right side
   1,361.56x = 1,435,638.15
5. Step 5: Solve for x
   x = 1,435,638.15/1,361.56
6. Step 6: Final answer
   x = 1,054.40