Finding the Fourth Proportional to 1,783.89, 2,667.96 and 1,620.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,783.89 : 2,667.96 = 1,620.41 : x
2. Step 2: Convert to fraction form
   1,783.89/2,667.96 = 1,620.41/x
3. Step 3: Cross multiply
   1,783.89x = 2,667.96 × 1,620.41
4. Step 4: Simplify right side
   1,783.89x = 4,323,175.72
5. Step 5: Solve for x
   x = 4,323,175.72/1,783.89
6. Step 6: Final answer
   x = 2,423.45