Finding the Fourth Proportional to 1,367.78, 1,886.52 and 1,072.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,367.78 : 1,886.52 = 1,072.46 : x
2. Step 2: Convert to fraction form
   1,367.78/1,886.52 = 1,072.46/x
3. Step 3: Cross multiply
   1,367.78x = 1,886.52 × 1,072.46
4. Step 4: Simplify right side
   1,367.78x = 2,023,217.24
5. Step 5: Solve for x
   x = 2,023,217.24/1,367.78
6. Step 6: Final answer
   x = 1,479.20