Finding the Fourth Proportional to 1,809.05, 2,495.88 and 1,012.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,809.05 : 2,495.88 = 1,012.23 : x
2. Step 2: Convert to fraction form
   1,809.05/2,495.88 = 1,012.23/x
3. Step 3: Cross multiply
   1,809.05x = 2,495.88 × 1,012.23
4. Step 4: Simplify right side
   1,809.05x = 2,526,404.61
5. Step 5: Solve for x
   x = 2,526,404.61/1,809.05
6. Step 6: Final answer
   x = 1,396.54