Finding the Fourth Proportional to 2,927.16, 4,389.12 and 978.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,927.16 : 4,389.12 = 978.84 : x
2. Step 2: Convert to fraction form
   2,927.16/4,389.12 = 978.84/x
3. Step 3: Cross multiply
   2,927.16x = 4,389.12 × 978.84
4. Step 4: Simplify right side
   2,927.16x = 4,296,246.22
5. Step 5: Solve for x
   x = 4,296,246.22/2,927.16
6. Step 6: Final answer
   x = 1,467.72