Finding the Fourth Proportional to 2,458.53, 3,687.86 and 978.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,458.53 : 3,687.86 = 978.03 : x
2. Step 2: Convert to fraction form
   2,458.53/3,687.86 = 978.03/x
3. Step 3: Cross multiply
   2,458.53x = 3,687.86 × 978.03
4. Step 4: Simplify right side
   2,458.53x = 3,606,840.16
5. Step 5: Solve for x
   x = 3,606,840.16/2,458.53
6. Step 6: Final answer
   x = 1,467.07