Finding the Fourth Proportional to 1,757.52, 2,637.78 and 978.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,757.52 : 2,637.78 = 978.30 : x
2. Step 2: Convert to fraction form
   1,757.52/2,637.78 = 978.30/x
3. Step 3: Cross multiply
   1,757.52x = 2,637.78 × 978.30
4. Step 4: Simplify right side
   1,757.52x = 2,580,540.17
5. Step 5: Solve for x
   x = 2,580,540.17/1,757.52
6. Step 6: Final answer
   x = 1,468.28