Finding the Fourth Proportional to 1,710.75, 2,562.03 and 978.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,710.75 : 2,562.03 = 978.15 : x
2. Step 2: Convert to fraction form
   1,710.75/2,562.03 = 978.15/x
3. Step 3: Cross multiply
   1,710.75x = 2,562.03 × 978.15
4. Step 4: Simplify right side
   1,710.75x = 2,506,049.64
5. Step 5: Solve for x
   x = 2,506,049.64/1,710.75
6. Step 6: Final answer
   x = 1,464.88