Finding the Fourth Proportional to 2,089.18, 3,134.79 and 978.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,089.18 : 3,134.79 = 978.67 : x
2. Step 2: Convert to fraction form
   2,089.18/3,134.79 = 978.67/x
3. Step 3: Cross multiply
   2,089.18x = 3,134.79 × 978.67
4. Step 4: Simplify right side
   2,089.18x = 3,067,924.93
5. Step 5: Solve for x
   x = 3,067,924.93/2,089.18
6. Step 6: Final answer
   x = 1,468.48