Finding the Fourth Proportional to 2,656.77, 3,987.05 and 1,780.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,656.77 : 3,987.05 = 1,780.94 : x
2. Step 2: Convert to fraction form
   2,656.77/3,987.05 = 1,780.94/x
3. Step 3: Cross multiply
   2,656.77x = 3,987.05 × 1,780.94
4. Step 4: Simplify right side
   2,656.77x = 7,100,696.83
5. Step 5: Solve for x
   x = 7,100,696.83/2,656.77
6. Step 6: Final answer
   x = 2,672.68