Finding the Fourth Proportional to 2,720.55, 4,081.59 and 772.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,720.55 : 4,081.59 = 772.77 : x
2. Step 2: Convert to fraction form
   2,720.55/4,081.59 = 772.77/x
3. Step 3: Cross multiply
   2,720.55x = 4,081.59 × 772.77
4. Step 4: Simplify right side
   2,720.55x = 3,154,130.30
5. Step 5: Solve for x
   x = 3,154,130.30/2,720.55
6. Step 6: Final answer
   x = 1,159.37