Finding the Fourth Proportional to 978.98, 1,352.18 and 713.00

Step by Step Solution

1. Step 1: Write the proportion equation
   978.98 : 1,352.18 = 713.00 : x
2. Step 2: Convert to fraction form
   978.98/1,352.18 = 713.00/x
3. Step 3: Cross multiply
   978.98x = 1,352.18 × 713.00
4. Step 4: Simplify right side
   978.98x = 964,094.01
5. Step 5: Solve for x
   x = 964,094.01/978.98
6. Step 6: Final answer
   x = 984.79