Finding the Fourth Proportional to 1,816.30, 2,736.58 and 1,643.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,816.30 : 2,736.58 = 1,643.18 : x
2. Step 2: Convert to fraction form
   1,816.30/2,736.58 = 1,643.18/x
3. Step 3: Cross multiply
   1,816.30x = 2,736.58 × 1,643.18
4. Step 4: Simplify right side
   1,816.30x = 4,496,685.31
5. Step 5: Solve for x
   x = 4,496,685.31/1,816.30
6. Step 6: Final answer
   x = 2,475.75