Finding the Fourth Proportional to 2,460.16, 3,689.63 and 978.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,460.16 : 3,689.63 = 978.87 : x
2. Step 2: Convert to fraction form
   2,460.16/3,689.63 = 978.87/x
3. Step 3: Cross multiply
   2,460.16x = 3,689.63 × 978.87
4. Step 4: Simplify right side
   2,460.16x = 3,611,668.12
5. Step 5: Solve for x
   x = 3,611,668.12/2,460.16
6. Step 6: Final answer
   x = 1,468.06