Finding the Fourth Proportional to 2,926.62, 4,390.53 and 978.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,926.62 : 4,390.53 = 978.84 : x
2. Step 2: Convert to fraction form
   2,926.62/4,390.53 = 978.84/x
3. Step 3: Cross multiply
   2,926.62x = 4,390.53 × 978.84
4. Step 4: Simplify right side
   2,926.62x = 4,297,626.39
5. Step 5: Solve for x
   x = 4,297,626.39/2,926.62
6. Step 6: Final answer
   x = 1,468.46