Finding the Fourth Proportional to 1,758.87, 2,636.91 and 1,209.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,758.87 : 2,636.91 = 1,209.42 : x
2. Step 2: Convert to fraction form
   1,758.87/2,636.91 = 1,209.42/x
3. Step 3: Cross multiply
   1,758.87x = 2,636.91 × 1,209.42
4. Step 4: Simplify right side
   1,758.87x = 3,189,131.69
5. Step 5: Solve for x
   x = 3,189,131.69/1,758.87
6. Step 6: Final answer
   x = 1,813.17