Finding the Fourth Proportional to 1,710.62, 2,563.38 and 978.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,710.62 : 2,563.38 = 978.58 : x
2. Step 2: Convert to fraction form
   1,710.62/2,563.38 = 978.58/x
3. Step 3: Cross multiply
   1,710.62x = 2,563.38 × 978.58
4. Step 4: Simplify right side
   1,710.62x = 2,508,475.60
5. Step 5: Solve for x
   x = 2,508,475.60/1,710.62
6. Step 6: Final answer
   x = 1,466.41