Finding the Fourth Proportional to 1,757.76, 2,635.25 and 978.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,757.76 : 2,635.25 = 978.03 : x
2. Step 2: Convert to fraction form
   1,757.76/2,635.25 = 978.03/x
3. Step 3: Cross multiply
   1,757.76x = 2,635.25 × 978.03
4. Step 4: Simplify right side
   1,757.76x = 2,577,348.67
5. Step 5: Solve for x
   x = 2,577,348.67/1,757.76
6. Step 6: Final answer
   x = 1,466.27