Finding the Fourth Proportional to 2,064.18, 3,095.31 and 830.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,064.18 : 3,095.31 = 830.55 : x
2. Step 2: Convert to fraction form
   2,064.18/3,095.31 = 830.55/x
3. Step 3: Cross multiply
   2,064.18x = 3,095.31 × 830.55
4. Step 4: Simplify right side
   2,064.18x = 2,570,809.72
5. Step 5: Solve for x
   x = 2,570,809.72/2,064.18
6. Step 6: Final answer
   x = 1,245.44