Finding the Fourth Proportional to 2,543.30, 3,815.33 and 788.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,543.30 : 3,815.33 = 788.46 : x
2. Step 2: Convert to fraction form
   2,543.30/3,815.33 = 788.46/x
3. Step 3: Cross multiply
   2,543.30x = 3,815.33 × 788.46
4. Step 4: Simplify right side
   2,543.30x = 3,008,231.15
5. Step 5: Solve for x
   x = 3,008,231.15/2,543.30
6. Step 6: Final answer
   x = 1,182.81