Finding the Fourth Proportional to 2,428.41, 3,642.48 and 786.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,428.41 : 3,642.48 = 786.15 : x
2. Step 2: Convert to fraction form
   2,428.41/3,642.48 = 786.15/x
3. Step 3: Cross multiply
   2,428.41x = 3,642.48 × 786.15
4. Step 4: Simplify right side
   2,428.41x = 2,863,535.65
5. Step 5: Solve for x
   x = 2,863,535.65/2,428.41
6. Step 6: Final answer
   x = 1,179.18