Finding the Fourth Proportional to 1,724.00, 2,379.06 and 978.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,724.00 : 2,379.06 = 978.02 : x
2. Step 2: Convert to fraction form
   1,724.00/2,379.06 = 978.02/x
3. Step 3: Cross multiply
   1,724.00x = 2,379.06 × 978.02
4. Step 4: Simplify right side
   1,724.00x = 2,326,768.26
5. Step 5: Solve for x
   x = 2,326,768.26/1,724.00
6. Step 6: Final answer
   x = 1,349.64