Finding the Fourth Proportional to 2,656.52, 3,986.68 and 1,780.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,656.52 : 3,986.68 = 1,780.69 : x
2. Step 2: Convert to fraction form
   2,656.52/3,986.68 = 1,780.69/x
3. Step 3: Cross multiply
   2,656.52x = 3,986.68 × 1,780.69
4. Step 4: Simplify right side
   2,656.52x = 7,099,026.79
5. Step 5: Solve for x
   x = 7,099,026.79/2,656.52
6. Step 6: Final answer
   x = 2,672.31