Finding the Fourth Proportional to 2,926.32, 4,389.88 and 978.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,926.32 : 4,389.88 = 978.06 : x
2. Step 2: Convert to fraction form
   2,926.32/4,389.88 = 978.06/x
3. Step 3: Cross multiply
   2,926.32x = 4,389.88 × 978.06
4. Step 4: Simplify right side
   2,926.32x = 4,293,566.03
5. Step 5: Solve for x
   x = 4,293,566.03/2,926.32
6. Step 6: Final answer
   x = 1,467.22