Finding the Fourth Proportional to 2,340.46, 3,510.72 and 780.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,340.46 : 3,510.72 = 780.46 : x
2. Step 2: Convert to fraction form
   2,340.46/3,510.72 = 780.46/x
3. Step 3: Cross multiply
   2,340.46x = 3,510.72 × 780.46
4. Step 4: Simplify right side
   2,340.46x = 2,739,976.53
5. Step 5: Solve for x
   x = 2,739,976.53/2,340.46
6. Step 6: Final answer
   x = 1,170.70