Finding the Fourth Proportional to 1,368.90, 1,886.49 and 1,036.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,368.90 : 1,886.49 = 1,036.80 : x
2. Step 2: Convert to fraction form
   1,368.90/1,886.49 = 1,036.80/x
3. Step 3: Cross multiply
   1,368.90x = 1,886.49 × 1,036.80
4. Step 4: Simplify right side
   1,368.90x = 1,955,912.83
5. Step 5: Solve for x
   x = 1,955,912.83/1,368.90
6. Step 6: Final answer
   x = 1,428.82