Finding the Fourth Proportional to 1,128.87, 1,690.98 and 1,034.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.87 : 1,690.98 = 1,034.37 : x
2. Step 2: Convert to fraction form
   1,128.87/1,690.98 = 1,034.37/x
3. Step 3: Cross multiply
   1,128.87x = 1,690.98 × 1,034.37
4. Step 4: Simplify right side
   1,128.87x = 1,749,098.98
5. Step 5: Solve for x
   x = 1,749,098.98/1,128.87
6. Step 6: Final answer
   x = 1,549.42