Finding the Fourth Proportional to 1,724.56, 2,380.08 and 978.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,724.56 : 2,380.08 = 978.52 : x
2. Step 2: Convert to fraction form
   1,724.56/2,380.08 = 978.52/x
3. Step 3: Cross multiply
   1,724.56x = 2,380.08 × 978.52
4. Step 4: Simplify right side
   1,724.56x = 2,328,955.88
5. Step 5: Solve for x
   x = 2,328,955.88/1,724.56
6. Step 6: Final answer
   x = 1,350.46