Finding the Fourth Proportional to 1,361.28, 1,876.03 and 1,111.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.28 : 1,876.03 = 1,111.80 : x
2. Step 2: Convert to fraction form
   1,361.28/1,876.03 = 1,111.80/x
3. Step 3: Cross multiply
   1,361.28x = 1,876.03 × 1,111.80
4. Step 4: Simplify right side
   1,361.28x = 2,085,770.15
5. Step 5: Solve for x
   x = 2,085,770.15/1,361.28
6. Step 6: Final answer
   x = 1,532.21