Finding the Fourth Proportional to 1,724.03, 2,379.04 and 978.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,724.03 : 2,379.04 = 978.06 : x
2. Step 2: Convert to fraction form
   1,724.03/2,379.04 = 978.06/x
3. Step 3: Cross multiply
   1,724.03x = 2,379.04 × 978.06
4. Step 4: Simplify right side
   1,724.03x = 2,326,843.86
5. Step 5: Solve for x
   x = 2,326,843.86/1,724.03
6. Step 6: Final answer
   x = 1,349.65