Finding the Fourth Proportional to 2,926.76, 4,390.37 and 978.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,926.76 : 4,390.37 = 978.96 : x
2. Step 2: Convert to fraction form
   2,926.76/4,390.37 = 978.96/x
3. Step 3: Cross multiply
   2,926.76x = 4,390.37 × 978.96
4. Step 4: Simplify right side
   2,926.76x = 4,298,011.86
5. Step 5: Solve for x
   x = 4,298,011.86/2,926.76
6. Step 6: Final answer
   x = 1,468.52