Finding the Fourth Proportional to 1,014.22, 1,406.17 and 980.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,014.22 : 1,406.17 = 980.05 : x
2. Step 2: Convert to fraction form
   1,014.22/1,406.17 = 980.05/x
3. Step 3: Cross multiply
   1,014.22x = 1,406.17 × 980.05
4. Step 4: Simplify right side
   1,014.22x = 1,378,118.63
5. Step 5: Solve for x
   x = 1,378,118.63/1,014.22
6. Step 6: Final answer
   x = 1,358.79