Finding the Fourth Proportional to 1,359.72, 1,878.72 and 1,126.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.72 : 1,878.72 = 1,126.44 : x
2. Step 2: Convert to fraction form
   1,359.72/1,878.72 = 1,126.44/x
3. Step 3: Cross multiply
   1,359.72x = 1,878.72 × 1,126.44
4. Step 4: Simplify right side
   1,359.72x = 2,116,265.36
5. Step 5: Solve for x
   x = 2,116,265.36/1,359.72
6. Step 6: Final answer
   x = 1,556.40