Finding the Fourth Proportional to 1,819.10, 2,543.50 and 1,819.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,819.10 : 2,543.50 = 1,819.10 : x
2. Step 2: Convert to fraction form
   1,819.10/2,543.50 = 1,819.10/x
3. Step 3: Cross multiply
   1,819.10x = 2,543.50 × 1,819.10
4. Step 4: Simplify right side
   1,819.10x = 4,626,880.85
5. Step 5: Solve for x
   x = 4,626,880.85/1,819.10
6. Step 6: Final answer
   x = 2,543.50