Finding the Fourth Proportional to 2,212.72, 3,317.98 and 980.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212.72 : 3,317.98 = 980.52 : x
2. Step 2: Convert to fraction form
   2,212.72/3,317.98 = 980.52/x
3. Step 3: Cross multiply
   2,212.72x = 3,317.98 × 980.52
4. Step 4: Simplify right side
   2,212.72x = 3,253,345.75
5. Step 5: Solve for x
   x = 3,253,345.75/2,212.72
6. Step 6: Final answer
   x = 1,470.29