Finding the Fourth Proportional to 2,622.74, 3,932.89 and 978.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,622.74 : 3,932.89 = 978.84 : x
2. Step 2: Convert to fraction form
   2,622.74/3,932.89 = 978.84/x
3. Step 3: Cross multiply
   2,622.74x = 3,932.89 × 978.84
4. Step 4: Simplify right side
   2,622.74x = 3,849,670.05
5. Step 5: Solve for x
   x = 3,849,670.05/2,622.74
6. Step 6: Final answer
   x = 1,467.80