Finding the Fourth Proportional to 2,518.76, 3,778.46 and 978.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,518.76 : 3,778.46 = 978.92 : x
2. Step 2: Convert to fraction form
   2,518.76/3,778.46 = 978.92/x
3. Step 3: Cross multiply
   2,518.76x = 3,778.46 × 978.92
4. Step 4: Simplify right side
   2,518.76x = 3,698,810.06
5. Step 5: Solve for x
   x = 3,698,810.06/2,518.76
6. Step 6: Final answer
   x = 1,468.50