Finding the Fourth Proportional to 1,809.63, 2,492.82 and 1,543.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,809.63 : 2,492.82 = 1,543.20 : x
2. Step 2: Convert to fraction form
   1,809.63/2,492.82 = 1,543.20/x
3. Step 3: Cross multiply
   1,809.63x = 2,492.82 × 1,543.20
4. Step 4: Simplify right side
   1,809.63x = 3,846,914.04
5. Step 5: Solve for x
   x = 3,846,914.04/1,809.63
6. Step 6: Final answer
   x = 2,125.81