Finding the Fourth Proportional to 2,978.18, 4,467.18 and 786.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.18 : 4,467.18 = 786.92 : x
2. Step 2: Convert to fraction form
   2,978.18/4,467.18 = 786.92/x
3. Step 3: Cross multiply
   2,978.18x = 4,467.18 × 786.92
4. Step 4: Simplify right side
   2,978.18x = 3,515,331.59
5. Step 5: Solve for x
   x = 3,515,331.59/2,978.18
6. Step 6: Final answer
   x = 1,180.36