Finding the Fourth Proportional to 1,137.87, 1,571.31 and 1,076.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,137.87 : 1,571.31 = 1,076.49 : x
2. Step 2: Convert to fraction form
   1,137.87/1,571.31 = 1,076.49/x
3. Step 3: Cross multiply
   1,137.87x = 1,571.31 × 1,076.49
4. Step 4: Simplify right side
   1,137.87x = 1,691,499.50
5. Step 5: Solve for x
   x = 1,691,499.50/1,137.87
6. Step 6: Final answer
   x = 1,486.55