Finding the Fourth Proportional to 2,458.72, 3,688.26 and 978.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,458.72 : 3,688.26 = 978.52 : x
2. Step 2: Convert to fraction form
   2,458.72/3,688.26 = 978.52/x
3. Step 3: Cross multiply
   2,458.72x = 3,688.26 × 978.52
4. Step 4: Simplify right side
   2,458.72x = 3,609,036.18
5. Step 5: Solve for x
   x = 3,609,036.18/2,458.72
6. Step 6: Final answer
   x = 1,467.85