Finding the Fourth Proportional to 978.30, 1,473.15 and 706.26

Step by Step Solution

1. Step 1: Write the proportion equation
   978.30 : 1,473.15 = 706.26 : x
2. Step 2: Convert to fraction form
   978.30/1,473.15 = 706.26/x
3. Step 3: Cross multiply
   978.30x = 1,473.15 × 706.26
4. Step 4: Simplify right side
   978.30x = 1,040,426.92
5. Step 5: Solve for x
   x = 1,040,426.92/978.30
6. Step 6: Final answer
   x = 1,063.50