Finding the Fourth Proportional to 2,754.68, 4,131.48 and 780.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,754.68 : 4,131.48 = 780.29 : x
2. Step 2: Convert to fraction form
   2,754.68/4,131.48 = 780.29/x
3. Step 3: Cross multiply
   2,754.68x = 4,131.48 × 780.29
4. Step 4: Simplify right side
   2,754.68x = 3,223,742.20
5. Step 5: Solve for x
   x = 3,223,742.20/2,754.68
6. Step 6: Final answer
   x = 1,170.28