Finding the Fourth Proportional to 1,361.48, 1,878.98 and 802.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.48 : 1,878.98 = 802.12 : x
2. Step 2: Convert to fraction form
   1,361.48/1,878.98 = 802.12/x
3. Step 3: Cross multiply
   1,361.48x = 1,878.98 × 802.12
4. Step 4: Simplify right side
   1,361.48x = 1,507,163.43
5. Step 5: Solve for x
   x = 1,507,163.43/1,361.48
6. Step 6: Final answer
   x = 1,107.01