Finding the Fourth Proportional to 2,543.30, 3,809.55 and 2,111.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,543.30 : 3,809.55 = 2,111.30 : x
2. Step 2: Convert to fraction form
   2,543.30/3,809.55 = 2,111.30/x
3. Step 3: Cross multiply
   2,543.30x = 3,809.55 × 2,111.30
4. Step 4: Simplify right side
   2,543.30x = 8,043,102.92
5. Step 5: Solve for x
   x = 8,043,102.92/2,543.30
6. Step 6: Final answer
   x = 3,162.47