Finding the Fourth Proportional to 1,708.30, 2,562.54 and 978.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,708.30 : 2,562.54 = 978.58 : x
2. Step 2: Convert to fraction form
   1,708.30/2,562.54 = 978.58/x
3. Step 3: Cross multiply
   1,708.30x = 2,562.54 × 978.58
4. Step 4: Simplify right side
   1,708.30x = 2,507,632.69
5. Step 5: Solve for x
   x = 2,507,632.69/1,708.30
6. Step 6: Final answer
   x = 1,467.92