Finding the Fourth Proportional to 2,146.08, 3,219.72 and 830.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,146.08 : 3,219.72 = 830.23 : x
2. Step 2: Convert to fraction form
   2,146.08/3,219.72 = 830.23/x
3. Step 3: Cross multiply
   2,146.08x = 3,219.72 × 830.23
4. Step 4: Simplify right side
   2,146.08x = 2,673,108.14
5. Step 5: Solve for x
   x = 2,673,108.14/2,146.08
6. Step 6: Final answer
   x = 1,245.58