Finding the Fourth Proportional to 2,622.47, 3,933.27 and 978.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,622.47 : 3,933.27 = 978.58 : x
2. Step 2: Convert to fraction form
   2,622.47/3,933.27 = 978.58/x
3. Step 3: Cross multiply
   2,622.47x = 3,933.27 × 978.58
4. Step 4: Simplify right side
   2,622.47x = 3,849,009.52
5. Step 5: Solve for x
   x = 3,849,009.52/2,622.47
6. Step 6: Final answer
   x = 1,467.70