Finding the Fourth Proportional to 2,543.37, 3,815.20 and 788.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,543.37 : 3,815.20 = 788.54 : x
2. Step 2: Convert to fraction form
   2,543.37/3,815.20 = 788.54/x
3. Step 3: Cross multiply
   2,543.37x = 3,815.20 × 788.54
4. Step 4: Simplify right side
   2,543.37x = 3,008,419.72
5. Step 5: Solve for x
   x = 3,008,419.72/2,543.37
6. Step 6: Final answer
   x = 1,182.85