Finding the Fourth Proportional to 1,281.83, 1,920.00 and 793.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,281.83 : 1,920.00 = 793.40 : x
2. Step 2: Convert to fraction form
   1,281.83/1,920.00 = 793.40/x
3. Step 3: Cross multiply
   1,281.83x = 1,920.00 × 793.40
4. Step 4: Simplify right side
   1,281.83x = 1,523,321.38
5. Step 5: Solve for x
   x = 1,523,321.38/1,281.83
6. Step 6: Final answer
   x = 1,188.40