Finding the Fourth Proportional to 1,361.52, 1,878.42 and 830.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.52 : 1,878.42 = 830.18 : x
2. Step 2: Convert to fraction form
   1,361.52/1,878.42 = 830.18/x
3. Step 3: Cross multiply
   1,361.52x = 1,878.42 × 830.18
4. Step 4: Simplify right side
   1,361.52x = 1,559,426.72
5. Step 5: Solve for x
   x = 1,559,426.72/1,361.52
6. Step 6: Final answer
   x = 1,145.36