Finding the Fourth Proportional to 1,403.03, 1,936.23 and 813.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,403.03 : 1,936.23 = 813.62 : x
2. Step 2: Convert to fraction form
   1,403.03/1,936.23 = 813.62/x
3. Step 3: Cross multiply
   1,403.03x = 1,936.23 × 813.62
4. Step 4: Simplify right side
   1,403.03x = 1,575,355.45
5. Step 5: Solve for x
   x = 1,575,355.45/1,403.03
6. Step 6: Final answer
   x = 1,122.82