Finding the Fourth Proportional to 2,734.80, 4,101.42 and 786.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,734.80 : 4,101.42 = 786.72 : x
2. Step 2: Convert to fraction form
   2,734.80/4,101.42 = 786.72/x
3. Step 3: Cross multiply
   2,734.80x = 4,101.42 × 786.72
4. Step 4: Simplify right side
   2,734.80x = 3,226,669.14
5. Step 5: Solve for x
   x = 3,226,669.14/2,734.80
6. Step 6: Final answer
   x = 1,179.86