Finding the Fourth Proportional to 2,212.93, 3,320.55 and 981.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212.93 : 3,320.55 = 981.19 : x
2. Step 2: Convert to fraction form
   2,212.93/3,320.55 = 981.19/x
3. Step 3: Cross multiply
   2,212.93x = 3,320.55 × 981.19
4. Step 4: Simplify right side
   2,212.93x = 3,258,082.15
5. Step 5: Solve for x
   x = 3,258,082.15/2,212.93
6. Step 6: Final answer
   x = 1,472.30