Finding the Fourth Proportional to 2,656.92, 3,983.25 and 1,780.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,656.92 : 3,983.25 = 1,780.30 : x
2. Step 2: Convert to fraction form
   2,656.92/3,983.25 = 1,780.30/x
3. Step 3: Cross multiply
   2,656.92x = 3,983.25 × 1,780.30
4. Step 4: Simplify right side
   2,656.92x = 7,091,391.63
5. Step 5: Solve for x
   x = 7,091,391.63/2,656.92
6. Step 6: Final answer
   x = 2,669.02