Finding the Fourth Proportional to 1,269.20, 1,751.83 and 1,137.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,269.20 : 1,751.83 = 1,137.98 : x
2. Step 2: Convert to fraction form
   1,269.20/1,751.83 = 1,137.98/x
3. Step 3: Cross multiply
   1,269.20x = 1,751.83 × 1,137.98
4. Step 4: Simplify right side
   1,269.20x = 1,993,547.50
5. Step 5: Solve for x
   x = 1,993,547.50/1,269.20
6. Step 6: Final answer
   x = 1,570.71