Finding the Fourth Proportional to 1,820.50, 2,743.15 and 1,621.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,820.50 : 2,743.15 = 1,621.59 : x
2. Step 2: Convert to fraction form
   1,820.50/2,743.15 = 1,621.59/x
3. Step 3: Cross multiply
   1,820.50x = 2,743.15 × 1,621.59
4. Step 4: Simplify right side
   1,820.50x = 4,448,264.61
5. Step 5: Solve for x
   x = 4,448,264.61/1,820.50
6. Step 6: Final answer
   x = 2,443.43